Razor types and points discussion

Jello shavers. Im looking to tap in to your knowledge bases a bit. So I have been using DE a few years now and recently going the chance to have a proper honed straight razor. I have been using it almost exclusively ever since. Im a minor gear enthusiast and want to get one or two more. Id like to add something modern, them something more out if the ordinary. I have been eyeing frame backs to fit the oddity role. Can someone explain why the frame? Why the different “structure” of the blade? Bennefits/drawbacks of frame back v sort of traditional shaped. Then points I'm noticing many frame backs seem to have what I guess is a “smile” and are rounded in the point, but maybe were originally not so, and the rounded point thats from honing? Well let’s see what happens here thanks in advance.

1) Most of the vintage frame backs did come with the smile originally.
2) The frame allowed the manufacturers to use less 'good' metal for the blade, and as grinding wasn't necessary to thin the blades - that made manufacturing cheaper. The frame stiffened the blades and maintained traditional honing geometry.
3) What you will notice is that framebacks are easy to hone (like a hollow-ground razor), but very stiff (like a wedge). You won't find a 'singing' frameback.
4) I have several normal straights and also a lot of framebacks. They all shave well, and I like them both. The Swedish framebacks in general are really very good.

Turns out i just needed the one brain, there. Thanks that was really helpful. This is exactly the info i was hoping get.