Being completely retired my finances are fairly simple. Still running Quicken 2014 on a 32 bit machine with Windoze 10. I don't download data from any institutions and hand key in all entrys. Use 4 different banks and their software handles all transfers between accounts or payments. Trade stocks and treasuries over the internet. Wife dabbles in crypto on her Chromebook with the oldest boy's help as I don't understand the programs they use. A real PITA at tax time. He runs the business on a Mac with Quickbooks. Don't even know how to turn the darn thing on if I had to.
Keep an older 32 bit PC for storing backups that will dual boot both Windows and Linux. Both of my laptops run Linux but haven't found a decent program for finances and keep nothing personal on either one, just web browsing, e-mail and such. Too cheap and too old to update.