Anything that got a significant update in the past ten to twelve years will support TLS 1.2. The window of systems that would support 1.1 but not 1.2 is pretty

Anything that got a significant update in the past ten to twelve years will support TLS 1.2. The window of systems that would support 1.1 but not 1.2 is pretty small. You have to go all the way back to IE on Windows XP before a lack of 1.2 support becomes an issue. So, yeah. You're absolutely right. In a lot of cases the loss of revenue from users with severely outdated software will be less than the cost decease of cutting spam and abuse. This gets back to an old question - to what degree should legacy systems be supported and at what level of expense? There's no one easy answer that works for everyone.