What LTS editions only do 5 years? I just checked SUSE, Ubuntu, and RHEL.
RedHat is up to 13 years, with the the first 5 years being "full" including releasing for brand new hardware and backporting as needed with another 5 years of "you can keep running it on the hardware you have, but we aren't promising support for new hardware" and another available 3 years of paid extension. Note that Windows 10 pretty much went "maintenance" with the release of Windows 11, so the RHEL lifecycle largely imitates the Windows lifecycle.
SUSE is a bit more generous on paper, but roughly this is about all the LTSes.
However day to day users are not interested and go for the options that favor rapid delivery of new capability, so people don't talk about them as much.