Hello,
thanks for your answers, I was wondering about PHP 7.4 in a specific thread just like many other users, I guess.
If I understand well, oCIS / ownCloud 10 aren’t in conflict, oCIS won’t overshadow ownCloud 10.
I’m not sure to understand your position about PHP 8.0.
PHP 7.4 security fixes won’t be done by the official PHP team by the end of this year. It shouldn’t be up to the maintainers of distros to patch security fixes to PHP 7.4 because some softwares still require it.
It’s a bad habit and we’ll still have PHP 7.4 running in 10 years with all the security/migration problems 
Also, by the end of 2023, PHP 8.0 won’t be maintained anymore, my point is that time flies by and ownCloud 10 might lose users, because distros won’t package old PHP versions forever, at least they shouldn’t.
An interesting thread about PHP versions.
If oCIS was a replacement to ownCloud 10 it wouldn’t matter so much, we could wait for a migration documentation to move from ownCloud 10 to oCIS.
I quoted answers from this topic.
I understand your position but IMHO it’s not “good advises”.
a) Using PPA, even when it’s not coming from some unknown source, is not a good way to keep your system up to date nor secure. The maintainer could stop anytime its support, could inject backdoors or anything catchy, there could be packages conflicts, etc … At least on the Debian point of view I share. But the same problems could occur on Ubuntu.
b) Right, Ubuntu 20 will stick around for a while, but still PHP 7.4 shouldn’t be maintained once its EOL has been set officially.
c) Yes but see b)
My point is not to be a hassle, just could you consider adding PHP 8 support on the official roadmap to keep ownCloud 10 afloat ?
Thanks for the effort put in ownCloud.
Cheers.