Re: 7 what?
Exactly. Linux has the same support issues that Windows has, just generally on shorter timescales.
I worked for a company that sold configured servers in 2015 with SUSE from 2000 on it, that hadn't had updates for nearly 10 years! Parts of their software wouldn't work on anything newer, so they just carried on using the unsupported Linux (hey, it's Linux, it is secure, it doesn't need patching). It was only when they couldn't get any more old-style RAID controllers that had drivers that would work on such an old system that they were forced to look at updating their software to work on modern Linux.
Biting the hand that feeds IT
