Programming in niche languages can be fun and be a relief from drudgery at the day job. Mainstream languages are not bad of course. Many of them are great. But

Programming in niche languages can be fun and be a relief from drudgery at the day job. Mainstream languages are not bad of course. Many of them are great. But the requirement to be reliable and production-ready greatly restricts the diversion of tools one can choose to play with.