This sounds suspiciously to me like "I rewrote my program in <x> new language and it was 20% faster and 200% easier!" in that yes, your new experience may be better, but that's not necessarily attributable to the new language/operating system, but instead that you just got rid of all the old cruft. It's entirely possible (and sounds to me likely, based on your story) that you could have just reinstalled Arch with the same positive effects.

Also, you may have lost features in the process. For example, if you rewrote your C program in Python, the code may be much cleaner, but also much slower. If you didn't need it to be fast in the first place, that might be a good compromise for you. If you did need speed, then making the Python program faster might require complicated work, like C FFI, and you might have been better off staying with the original C. Comparably, Arch's PKGBUILD makes packaging new programs very easy, whereas despite having spent a number of hours trying, I still do not understand Debian's packaging format(s). If you rarely use uncommon programs, that may not be an issue for you.