It is important that you get fixes to packages that occured in the last like 2 years.
It is generally not really nice to run outdated software, even though it works kinda well.
If you use Debian you really need to use Flatpaks, and Mozillas PPA for regular Firefox. Then yes, probably a good OS.
I started on MX Linux because some strange Distrowatch bump. My IT support told me my Nextcloud version was outdated, and I didnt know Flatpak back then.