It's not a direct replacement; I fixed a lot of annoyances from PicoCSS.
Several of their new components are just classes, defeating the original purpose and contradicting the vision of Pico.
Why are the first one or two letters in headings wrapped in <em>, like the _Bl_ in "Blades"?
Why are they calling their Pico fork "anyblades/pico", when the original Pico author's post says "The Pico CSS name and logo are not covered by the MIT license. Please give your fork its own name, so users don’t confuse it with the original."?
The worst offender: What is going on with this nonsense: https://blades.dev/css/frameworks/
Please, just use a link. This has a destination, so making it masquerade as a button gives so many false affordances.
I'm not sure what other use cases are, but it's also just true that limitations can be fun.
I created a similar alternative, Neat CSS, a while back. I use it for tons of projects. It could probably use a fresh look from me to see if there's anything I want to update but it's been a stable "framework" for me. I didn't intend it to be classless, though it's mostly semantic, but I instead focused on keeping it small and tight. It's only 3KB.
Anyway, thought I'd share it here too.
Small bug, opened an issue here: https://github.com/vladocar/Sumi.css/issues/1