VaGNaroK for the moment, when i release a beta, on a very little number of people do tests. it is why when i see no comment about somebody making tests, once my tests are done, i release.
i dont think that 2 monthes are needed to test batocera. if we do that, generally devs delays activities after releases. but we can mix depending on what is changed in the version and if people are telling that there aredoing test or not.
i noticed that when i release a rc, i get feedback in the coming 3 days but not after.
last versions were special because we did big buildroot upgrade which causes issues generally. but for versions for which i know we modify only specific packages i wont have to wait 2 monthes to release the fixes.
so in conclusion, we'll see depending on testers work/suggestions, but at least the excel is a good start point.