Longtime Mint stickler here, never developed a taste for any other distro schools (Arch, Fedora, other *buntus and Debians). But tried out MX after a long period of deferring and I am genuinely blown away. This distro has everything I could have ever ask for - Debian stability coupled with advanced hardware support (with more recent zen kernels and drivers), a solid opinionated Plasma DE setup that is both minimalist and all-encompassing at the same time, and a full stock of sensible and pragmatic utilities to cover the boring stuff.
Mint's relative lethargy at migrating to wayland has been increasingly becoming a sore point due to the sheer practical difference it makes (especially in terms of multi-monitor HiDPI and fractional scaling, in addition to security and performance). MX KDE has all that covered and then some. It's the first time I had to genuinely stretch to find any fault. The only complaint I have is that they aren't letting me post this testimonial in the MX forum because it doesn't accept anon-aliased emails for logins.
I suppose COSMIC technically never migrated/transitioned from X11 to Wayland, because it's been Wayland-only from inception.
I should have quoted the part I am referring to:
I meant that there is a desktop environment with full Wayland support. And my question was if s/he considers COSMIC to be a smaller DE, that could qualify this statement.