I recently came across a new platform while browsing, and I was surprised by how smooth and fast the overall experience feels compared to others I've tried before, especially in terms of loading speed and usability —
https://mooc.rtu.lv/members/jlmmmvgpun3252/profile/
https://community.oncord.com/user/83p
https://hoho.zone.id/user/jili777-h