For whatever automation a new tool gives you, you get new maintenance on that tool, other languages will want a tool that gives those features, systems running

For whatever automation a new tool gives you, you get new maintenance on that tool, other languages will want a tool that gives those features, systems running older versions will want upgrades in order to support the tool, 20% time will be spent on getting it running immaculately on Emacs, security researchers will find bugs in the tool so everyone has to fix, patch and upgrade, web sites for showing off the tool need designing and hosting, support forums have to be staffed, blogs have to be written, some novel use of the tool requires integration with various other systems, enterprise asks for a powerbi version that can integrate with oracle (it ends up being 5x slower, but does lead to more jobs in maintenance and meetings), more research is produced etc. etc.