It’s what they made to replace conhost.exe, even open source so actually pretty cool considering it’s M$.

This is still the case for many South Korean shits, tho these days you can also use a (Googled) Android or iOS device with some shitty app.

Explorer7 is decent, allows the Win7 explorer to be used on Win8/10/11. https://github.com/world-windows-federation/explorer7

For an actual custom shell there’s xoblite https://xoblite.net/shell/ tho I haven’t used it personally. I just use bbZero https://archive.org/details/bbZero_install_1.18.0-rc6_mojmir, this still works on Win10 though UWP stuff are broken.