I've been reluctant to try to upgrade from Atma to Animus because I [dun goof'd] my first journey through the Zenith phase of gathering Atma stones. I ended up spending about 3 weeks in South Shroud, where no Atma stones drop, until someone actually told me I would get nothing.
The "upgrade" from Zenith to Atma made me slam my face against the desk, initially. Looking back on it now, I came to realize Relic weapons, and everything about this game for that matter, are a journey in themselves.
Which is why, despite the fact that I'm hesitant to move from Atma to Animus, I'm eagerly hoping I'll get a chance to start again on the next weapon and try to do things right next time around. It didn't hit me at first, but the idea of strengthening a legendary weapon reminds me of the Samurai and how they spoke to their swords, how their weapons were truly a part of them.