Isn't B2 cheaper than Wasabi? B2 is $6/TB while Wasabi is $6.99/TB. Why would you have to manage hot and cold storage with B2?

Wasabi also treats every object as having a minimum 90-day storage period. So if you upload something and delete it, it's still considered "stored" for billing purposes for that 90-day minimum.

B2 also gives you 3x storage as free transfer compared to 1x for Wasabi.

I'm not saying you shouldn't go with Wasabi, but the reasoning you've articulated doesn't seem to track.