I've been on Mastodon for over a year and the content simply isn't there. Several of the people that I follow on Twitter have tried moving or duplicating to Mastodon. They've had a fraction of the visibility and engagement from commenters that they would get on Twitter. Invariably after a few months they have essentially given up on it as a primary medium. For me the discoverability is essentially non-existent, which I don't think is helped by the idea of it being based around instance-local communities, which have no meaning when you're looking at something like Twitter.
You really should try k3b. Brasero was always kind of a joke by comparison in my experience. For example, k3b easily let's you run diagnostics on your dependencies, so you can check that they are present and correct.
Lord of the rings has aged noticeably and not in a good way. I really loved BSG2003 but I haven't rewatched more than a few episodes. A lot of commenters here are suggesting that it's aged poorly in places and the ending was always disappointing.
Cord: had some contact from companies leading to interviews but also some contact me and then ghost on response
Otta: more manageable search than LinkedIn
Hackajob: been a waste of time for me
Linkedin is still the big gun. Really don't like how they game everything around job hunting, or the endless sea of Indian recruiters from Hyderabad pretending to be in UK/USA who can barely speak English and 'have a requirement...' but clearly have no concept of geography.