I once wrote about using GnuCash as a freelance solo developer at https://nickjanetakis.com/blog/using-gnucash-as-a-freelancer... . I started using it in 2017 and still use it today. It's still really solid and makes filing quarterly taxes not too painful. In my opinion it's one of the best tools out there if you like your privacy and don't want to link your bank accounts to a third party service.
I didn't include this in my original reply but today is May 1st. Since GnuCash involves manually entering in transactions it's easy to think that'll take a ton of time. I just timed myself and it took 5 minutes to input everything for April 2022 into GnuCash. This includes all income and expenses (personal and business). I'm not even using GnuCash's automated feature for recurring payments too, so that 5 minutes incl…
Later, switched to beancount, it had a CSV importer and I tweaked some example script to do an "interactive" import. Each transaction would be presented and I could accept it as is, or modify it. If I saw a common issue, I could make a copy of the CSV and do a bulk replace, massage the data up front and quickly import.
I'm not saying you need to switch to CSV since your system is working for you. I'm mainly just agreeing that manual entry from a monthly statement can be pretty quick. But for those that are lazy like me that don't responsible balance the books each month, manually grabbing the CSVs and importing many months of statements in an afternoon can still be pretty quick. I would keep the bank statement PDFS + the "official csv" around as a sort of backup. Someone wanting to try GnuCash or any accounting software can start by downloading their statements/csvs for the last year and start punching their transactions in to get a real feel for how working with it will be.