New frames over old frames?

Does anyone know about door frames and doors?
I have steel frames in my apartment that lead under the screed. Removing them turned out to be only somewhat good for two doors that had to be removed anyway.
Only the appearance bothers me about the old steel frames; the rest is basically completely okay.

Now I have read that there are also frames to slip over. So a purely aesthetic matter that covers the old steel frame and then achieves a modern look.
On average, you probably have to expect up to 70mm loss in width and about 35mm loss in height.
I can accept the loss in height. 7cm in width is already relatively a lot.

Has anyone installed such renovation frames before and can say something about them?
How they hold up over a longer period of time, whether the loss in width is worth it or not, etc.?

Repaint door frames?

I had already done it once, it also looks okay but it simply doesn't come close to a modern style. I think the door frames and doors make a big difference in the appearance of an apartment and I don't necessarily want to leave them out. So far, I had pushed the door frame and door back because the budget had to cover more important things first. But now that it can also be done financially, I am reconsidering. A renovation door frame, as far as I have seen, doesn't cost much money (100-200€). So if the quality is right, I will probably go for it. However, I would first like to have some long-term experiences from others.

...??? Painted steel frames look more modern than the common frames, but you also have to paint well (-> matte, roller, etc) Our "high-quality" frames look old-fashioned compared to those from my parents' house built in '78... Well, or just plain ordinary

I don't find the steel frames with the narrow edges particularly great. No matter what kind of paint is on them. :/

Then swap. So now you will surely walk past it for the next 2 years and get in a bad mood
I think everyone knows the effect... objectively, it can no longer be grasped.