About time, even Phones are 64bit now.

Some custom 32bit poorly written software may not work under Win64 (could it possibly have 16 bit code inside? I came across
couple programs like this years ago), but I would question updating graphic drivers on non gaming, business computer to begin with. I have 5 year old Dell laptop and Intel didn't update driver for it since 2014 or something, but I don't care, everything works fine and since can't play graphic intensive games on it anyway, I wouldn't bother updating drivers, even if they had them.

Pete4 said:

Some custom 32bit poorly written software may not work under Win64 (could it possibly have 16 bit code inside? I came across
couple programs like this years ago), but I would question updating graphic drivers on non gaming, business computer to begin with. I have 5 year old Dell laptop and Intel didn't update driver for it since 2014 or something, but I don't care, everything works fine and since can't play graphic intensive games on it anyway, I wouldn't bother updating drivers, even if they had them.

Some older 32 bit applications had 16 bit installers which cannot run under a 64 bit OS. However, if Windows detects that the application is using one of a few supported 16 bit installers it will use a compatible 32 bit version. If the installer is not one of these few the application will not install.

Developing and maintaining drivers for a device as complex as a modern video system is far from simple and involves considerable expense. This is more complex than application development. As each year passes the cost of maintaining 32 bit support increases while the numbers of those using them continued to drop. That cannot continue indefinitely, particularly in a highly competitive market. There eventually comes a time when the cost can no longer be justified. Dropping 32 bit support frees resources that be used for 64 bit driver which will benefit a much larger market.