Honestly, if the FOSS community wants better adoption of these technologies, there needs to be an stronger emphasis on presentation and UI/UX.
The general public isn't interested in using something that looks janky, behaves glitchy, or requires fiddling with settings to get looking nice.
Say what you want about that, I'm not defending it. I think people should care more about content and privacy/freedom vs just shiny things, but that isn't the world we live in right now.
The big tech corpos know this, companies like Apple have become worth trillions by taking existing tech and making it shiny, sexy, and seamless.
Maybe that is just antithetical to FOSS principles. I don't know what is the correct approach. All I know is I've heard so many folks who are curious about trying out FOSS software give it up because they encounter confusing, ugly, buggy user experiences.
Some FOSS products have figured this out, Bitwarden, Proton Mail, and Brave Browser have super polished and clean UX and generally are as or more stable than their closed-source counterparts.
Sad truth. I'm super happy with my FOSS experience overall, but I'm also a techie and very open to tinkering with stuff.
OP, I like several of your examples though. Lots of the old school tech is really solid. Just needs a clean fast front end in many cases.