What if there was a profiler or setting that helps to reencode existing lossy formats without introducing too many more artifacts? An sizeable collection runs i

What if there was a profiler or setting that helps to reencode existing lossy formats without introducing too many more artifacts? An sizeable collection runs into the issue, if the don't have (easily accessible) lossless masters. I'd be very interested if I could move a variety of mp3s, aacs and vorbis to Opus if I knew additional quality loss was minimal.