I actually have to disagree. I think it really depends on who you follow. For a long time I didn't use twitter at all, but I've recently become active.

The hardware hacker community (think Hackaday types) on Twitter is pretty awesome and a lot of fun to follow.

Stuff like the below comes through all the time, and the discussions with people making things are great.

https://twitter.com/MrRobotBadge/status/1212038632246251520 https://twitter.com/johndmcmaster/status/1211923709910376449 https://twitter.com/mifune/status/1168604582748073986