Sadly Mojave is my last MacOS, too many 32bit apps I can't do without and won't be updated to 64bit, shame they can't allow a compatibility mode, but this is progress I guess.
you can't find replacement apps? or those developers aren't going to upgrade to 64? down the line (a year, a few years), you may decide (or need) to move forward... good to, at least, start planning...