Mac Pro xeon 2013 work flow till 2020

Can I get upgrade for cpu 64 gbs memory also is it working till what os ? Till 2020 mixing with back up on Mojave will work ? I have installed important plugins I want make sure I can work on Mac Pro xeon 2013, till2020 with upgrade memory 32gbs kit up to 4 times to get to 128 gbs ? Also I want to know cpu how to upgrade to more then 12 core for mixing with new plugins till 2020 year release and want to stay till 2018 update plugins in Mac to xeon, will cpu 12 core will be enough for 150 tracks to mix