My next safety razor

You might consider an open comb, and mild. I suggest the Timeless 0.68 with a scalloped cap. I find this razor gives me a great shave with two passes (WTG & ATG). My sensitive areas are my chin and mustache areas. I ride the cap for these areas and get good results without irritation. The oc and scalloped cap (when I ride it) allow soap to pass and help lubricate my shave.

Confession: Besides the two passes I always have areas where I apply additional lather and clean things up a bit.

Rockwell 6s. Great razor with lots of options re aggressiveness. I started with a DE89 too but if I’d started with the Rockwell it could easily have been the last razor I ever needed to buy.

Do I have to change the 3 platings of the Rockwell during the shave?

If you want different levels of blade gap during the shave, you may change. If you are comfortable with one level, no need to switch plate mid-shave, or ever really.

Most adjustable razors allow for easy adjustment on the fly... Turn a dial and it's more or less aggressive. The Rockwell, with actual plate changes, isn't as easy. Each plate has two sides, with a number depicting how aggressive / efficient it is. They are: 1-3; 2-4; 5-6. It's more of something you determine before the shave, or between passes.

On the plus side, it does not have tiny moving parts... In fact, the razor as a whole is a TANK. It's one of those razors that won't just outlive you, but might just live through a nuclear accident. Joking... But I could be right, still. (Really talking about the 6s here)

They make two versions (well, two main versions): Chrome (6c) and Steel (6s). The chrome is a basic chrome coated zamak razor. So, like other razors of this type, if the chrome plating fails the razor won't last too long (gets chipped, for example). It's also ~ half the cost of the steel version. IMO, both are well priced for what you get, though.

Here's Rockwell's descriptive image of the razor of its parts...

I’ve never felt the need to change “settings “ in any adjustable razor during any given pass although I have between passes. That said, switching plates on the Rockwell would take probably 10 seconds longer than moving a dial on the handle if you have the other plates handy. The 6s also comes in colours now too. Black, blue and red in addition to the original battleship gray. There is no doubt that there are many more aesthetically appealing razors on the market, (usually at higher price points) but there are few that shave as nicely in my opinion. I can’t speak as to all high end razors because I haven’t tried all of them but the several that I do own while all nice shavers in their own right, don’t shave me as nicely as the Rockwell 6s.

These are the blades I use:
Gillette Red blades: https://www.barbierit.ro/produs/lame-gil...achete/262
Gillette Blue blades: https://www.barbierit.ro/produs/lame-gil...achete/261

I started my DE journey last year with the Rockwell 6s and did not regret it as I could start off with the milder plates and move up to the more aggressive plates as I got more confident and technique improved.

Its still in my rotation but does not see as much use as the Lupo .72, Lupo .95, ATT R1, Gamechanger 84.

Any of these would be a great razor choice if you take your time and practice your technique.

I would consider these, if you want to upgrade the closeness of your shaves a bit - they are all pretty affordable:

Mühle Rocca - a bit more efficient than the DE89, but by no means a monster. It's made from 316L stainless steel, and the head is CNC machined.
The Mühle Rocca is my personal favourite razor of all time so far, the Tatara Masamune Nodachi SB is almost as good for me, still not quite there.

Edwin Jagger 3One6 - a formidable alternative to your DE89, an upgrade and a great way to get more effective and smooth shaves.
It's made from 316L stainles steel, using Metal injection Moulds and not CNC machined. The SS handle is CNC machined though.

RazoRock Game Changer og Lupo - both CNC machined 316l stainless steel.

Rockwell 6S - stainless steel version of the Rockwell razor - a bit clumsy head design, but what a great razor to use, very natural flowing on your skin.
Nice that it comes with 6 different base plates.

What about a King C. Gillette or a Parker 26C for my next safety razor?