I have worked for pretty much my entire adult life in the field of accounts, and throughout that period I have almost always used, to varying degrees, a package from Sage.
This started in my first job, working for a firm of chartered accountants. Around 1990-ish, they had purchased a copy of Sage’s software. The intention was to use it to maintain the records for a client, and they asked me (as the resident computer geek) to learn to use the software so that I could train the person who would actually be using it, and provide oversight and support where necessary. Since then, I’ve used it at various clients and, in recent years, even for my own accounts.