Carl,
I am perfectly happy using AC 6.3.3 on Win 7, it meets my needs. Indy was going to host for me to continue after support ends for Win 7 in January 2020. Sadly, now I need a different plan. So, I am going to upgrade my local Win 7 to Win 8 to buy a couple of years, and not have to use Win 10. AC 6.3.3 is not compatible with Win 8.
I am probably only going to practice a couple more years. So, I do not want to upgrade computers, peripherals, everything.
I like the freedom that versions below 9 afford, to install myself without having to be ?credentialed?, and without my data being collected.