Most software companies do beta testing with a group of enthusiastic customers. Intuit just releases the software three months before they're done with the programming. Let the paying customers do the testing for you! I find things like "401(k) limits haven't been adjusted for 2020" to be pretty ridiculous. Those numbers have been publicly available for an entire year now.
I have a spreadsheet I use for QC and for tax planning. The first thing I did when I rolled it from 2019 to 2020 was to update all of the inflation adjustments.
I'm not too concerned about 2020 tax law changes at this point. The probability of a second round of 2020 stimulus checks to dead people gets smaller each day.
I think the biggest mystery for the time being will be deductibility of PPP expenses. For those I'm planning a "wait and see" approach pending Congressional action.
If Congress can agree on any of the various Biden proposals, I suspect they won't be implemented until TY2022.