[lordlimecat]

Anyone who has dealt with diverse, mixed-distro environments can tell you that CentOS / RHEL is a lot more "stable" than Ubuntu. Go try to script ip address changes or MAC reporting across Ubuntu 12.04 - 20.04 for instance, theyve changed the tooling like 3 times. With CentOS, deprecation has a long tail, so whatever works on 8.0 is likely to work in 7.0 (going back to 2012) and maybe even 6.5.

Likewise, in those mixed environments, go run `apt upgrade` and `dnf upgrade` across the board; your CentOS / RHEL breakage will be quite small, compared with the havoc that will occur in your Ubuntu deployment.

[yjftsjthsd-h]

> With CentOS, deprecation has a long tail, so whatever works on 8.0 is likely to work in 7.0 (going back to 2012) and maybe even 6.5.

And the reverse is even more true: If your app worked on RHEL 5, you can probably blindly copy it to an EL 7 box and it will just work (ask me how I know;]), and probably it would for EL 8, too.