Hmm... I do syncing/stretching to address clock issues in Sequoia, mix in Nuendo, master in WaveLab, cut in CDWav, burn in Nero.
Nope. Best to use a tool for its best features and forget what it isn't so good at.
Not everyone has a massive s/w budget for this hobby, or likes to run cracked software, so some people like to do as much as possible within a single app. And often times, IME, some all- or nearly-all-in-one software (or combination of just a couple apps) accomplishes the same goals / quality as others, but simply does so differently (ymmv).
At any rate, rebop, you probably won't find a single app that accomplishes everything you want, as they serve different purposes. The farthest you'll probably get - drawing from kukyfrope's list of activities - is to find a single app that handles all your audio effforts: syncing/stretching (if you do that kinda thing), mixing, mastering, tracking, and burning (audio). Burning data, compressing to FLAC, BT seeding/leeching, printing CD labels, etc., all generally require different purpose-built apps.
The good news is there's quality, free (or nearly free) software to accomplish everything we generally want to do, so a limited budget won't prevent one from fully geeking out in this hobby of ours.