One word: OUCH.
I am slowly moving forward with Roster Builder 5, including its port to Linux/MacOS. With this version I am seriously looking at restructuring the primary database that has all of the data that I scrape from time-to-time off of the Master Unit List web page. Up until now, I had about 6,000 line items that whittled down for various reasons to 4,600 records. Well, I just scraped the MUL and it's now at over 8,000 records.
What this means is I have to now recomb over the database, update the old records, verify the MUL record number didn't change, then I can start working on the new records. Combined with combining the CBT and AS databases, AND coding the changes, with everything else going on in my life, I'm going to say "4th Quarter 2022" as an attainable goal as to when you can see RB5.
If you just can't wait, you can hire me for a contract job and I'll take a leave of absence from my day job. That would let me work non-stop 40 hours a week, for which I would charge $50/hour, which is about what I'm getting from the day job, factoring in overtime and all that. I should get it done in 1-2 months working on it full time.