On Friday, January 18, 2019 at 7:53:08 PM UTC+8, mechanic wrote:

That's really a choice for MSFT. When/if they no longer support a
version - usually after a couple of newer versions have been
released - they are perfectly entitled to label the old version
'obsolete'. Fans of such versions of course may crowd together and
share hints and tips, just like fans of old cars do even after the
original makers went out of business. At the present time we know
MSFT have released win10 versions 1511, 1607, 1703,1709, 1803, 1809
in a semi-annual pattern of feature updates. Hard to keep up for
large user organisations no doubt, but easy enough for individual
home/pro users, just like a stream of service packs. The only hard
choice recently is the move from support for 32 bit machines to a 64
bit focus. That is a hard one when there are significant numbers
still with 32 bit machines.


32-bit? that would go back to Northwood Pentium 4...
Or do you mean with 4 GiB of memory or less?