@wolstech
I use XP and I have a support for SNI-based SSL with no problem in such browsers like Firefox, Chrome, Opera (even the old "real" one v12) or with cURL used with PHP. I didn't check the cURL, but newer browsers (not Opera v12) for default are using TLS 1.2.
However there IS a problem with connecting to SOME websites/servers. I'm not sure why exactly, but probably because of the way the 'handshake' is made or because of how the certificates are verified.
@SMARTDODO
What is a difference for YOU using TLS 1.2 or 1.3 for your connections if SOMEONE ELSE is using TLS 1.1 or 1.0 or is not using encryption at all? Why do you want to force on EVERYONE to use only newest encryption methods?
Remember that forcing newer encryption methods means that you are forcing updates of software. Updating software quite often means forcing the system updates. Forcing system updates quite often means forcing the hardware upgrade or change.
What's for to change the hardware if old one is still working? That's not economical AND not ecological. Even if you will properly in 100% recycle the old hardware (which is currently not tha case) then while transporting it, during the whole recycle process, during production of new hardware, packing it and transporting (very often on very large distance) you are using additional resources and producing additional trash and pollution.
In my opinion the old hardware should be used for as long as it's possible and that's why I don't really understand this eagerness to update and upgrade everything so quickly with disabling support for older softwares, which means cutting access for everyone that can not or don't want to get new hardware.
And no, security is not an argument for me, because with having old system and old software and computer running 24/7 I have no problems with security since... 2006? And in 2006 that was simply my stupidity and not system or software problem. If someone is conscious/aware computer user than can use older software and have no problems, while if someone is unwise then even yesterday's update won't be enough to protect him.