A large amount of economically essential work is performed by people who do not sit at desks, in businesses too small to interest enterprise software vendors and too numerous to ignore. The software serving them — dispatch, scheduling, compliance, field service, municipal reporting — is unglamorous, sold slowly, and frequently priced as though nobody expects it to matter.
This topic covers that category: why labour constraints make it durable, why the sales cycle keeps competitors out, and how to tell software that has genuinely embedded itself in a technician's day from software that merely invoiced someone once. The distinction usually shows up in retention long before it shows up in the multiple.