Ok, thanks to both of you for your inputs!
Is it possible to have a dual install 1.15.4 and 1.16? That would be the best way to test which one suits my needs best. Do I just need to install EECH + 1.15.4, rename the folder, and install 1.16 on a new install? Where is the 1.15.4 package to be found?

"We warned you, but you just wouldn't listen..."