It was a way to view multiple lists at once, your home feed, various accounts, hashtags, your mentions, notifications, DMs, etc. Super useful. I stopped using Twitter altogether when they updated it earlier this year and made it significantly clunkier UX + promised to make it paid.

It was the only way to use Twitter for me. Custom feeds for lists etc, chronological, and all on one page. Such great information density.

I would have gladly paid to use it before the new ownership too. Then again the new update for it added a couple things I hate so that makes it easier to move on too.

A better frontend, basically.

It guaranteed chronological timeline and multiple columns.

The only way to use Twitter for work

Basically now you have to choose between quitting or giving money to the biggest asshole on the planet