Yeah, it’s still around but it honestly is just a zombie at this point. Right now it hasn’t had an update in almost two years and even before, including the last few years, these were mostly “maintenance updates”. Most times it’s to fix security vulnerabilities, but even there it’s lacking since HIGH rated vulnerabilities often would get fixed after 6 months.
When Sun was slurped up by Oracle, most open source contributors were reluctant on what will happen next. At the time, Oracle was already knee-deep in the Google Android Java lawsuit and Oracle already withdrew contributing to the project. The most logical step for many was to make a fork and make their own foundation - The Document Foundation. OpenOffice only survived a bit afterwards when Oracle donated the project to the Apache Foundation and was mostly getting contribution by IBM. Since most contributors already moved to the LibreOffice fork before, OpenOffice never was able to get enough contributors on it and fizzled out after IBM ceased any contributions.
In Japan, most of the convenience stores are very well distributed making it that you often times have one close-by. Additionally, a lot of those convenience stores are 24/7 open. With it being open any time and having it close-by, it is still convenient enough if you can muster to go to a store and pay by cash. If you live in the city for example, you have one that only takes 1 to 10 minutes by foot.
Unfortunately that isn’t the case with Tuta. Since they have an encrypted mailbox and their web client uses E2EE, they don’t have any IMAP or POP3 connection because they can’t guarantee it using E2EE