It seems fast and does a good job preserving feed scroll positions. 3-column layout has its advantages on a large screen. However, I suggest other devs join Iris instead of developing their own client 😄
In reading a fascinating and important discussion of the lack of a termination clause in the new Mastodon.social Terms of Service, I was GOBSMACKED to discover that the new ToS including a "binding arbitration waiver," which takes away your right to sue, no matter how badly the service abuses you.