I still have a UAD-1 and as that is 32 bit only I need to be able use 32 bit VSTs.
 
I know that the real answer is replace the UAD-1 but that's not an option if I need to buy a new DAW.

With Cubase you just need to use Bitbridge for 32bit plugs.

With SO you'll need a bridge, same as Cubase. Jbridge works well with it and is about $18.
 
Dan

Just use Jbridge. It's a great program, and I can run all my (older) 32bits plugins without any problem in Cubase 9. It's available for a very modest price (€14.99) here: https://jstuff.wordpress.com/jbridge/
 
I cannot say how this will work for UAD-1 plugins, because I do not have that hardware/software combination. I can only say that even very old 32bit plugins (that will never be updated to 64bit) seem to run without any problem. I guess you have to see for yourself if this works for UAD plugins or not.
 
That said - I really suggest you try to run only 64bit plugins. I can imagine you do not want to upgrade your UAD-1, because of the costs involved. That would be an hurdle for me too to be honest ;-).