owncloud 10.1 is compatible to PHP 7.1, 7.2 according to documentation. The Question is will owncloud run if I update from 7.0 to PHP 7.1 or 7.2. I updated my server once from ubuntu 16.04 to 18.04 and it worked, but it was not stable. So I saw that clamav was making problems and installed it new. It changed php curl configuration and onwcloud was crashed and I was not able to get it back to life. I installed php curl new but owncloud was still claiming there is al problem with php curl. So I went back by image to ubuntu server 16.04. The information I got is, owncloud is very sensitive on php configuration.
i think this depends on your needs / requirements. But if your problems where related to whats discussed in the linked issues above then i think such situations could be easily solved by you if you install the correct PHP extensions for the new PHP version which are listed here: