The newer stuff is really nice, but I wonder how it will be performing in 49 years (the age of our C-150). I guess some of us may still be around to see

.
Unless I'm very wrong, lack of support will be the biggest killer item on this front.
As an example, my perfectly functioning GX55 GPS had a simple display issue years ago but the vendor quit manufacturing them for Garmin (Apollo) so it couldn't be fixed.
Rather sad but it's the reality we're faced with.
Jim