Don't bet on boring languages. Bet on community and ecosystem. If those are vibrant and a good match for your domain, go for it. If multiple languages meet that

Don't bet on boring languages. Bet on community and ecosystem. If those are vibrant and a good match for your domain, go for it. If multiple languages meet that criteria, choose the one you believe in. Conversely, if you are developing a new language, focus on building a community and ecosystem around certain problems, even niche problems. That will give a consistent group of users that can build out the rest of the ecosystem slowly.