Hello,
I have an old computer at home. I like it. It works perfectly, I do everything on it.
But for work, I had to buy a laptop. I choosed a Lenovo x250, as I use OpenBSD and it works perfectly on it. Too much powerful for my needs.
I keep both machines sync using openrsync+ssh (script: gemini://ybad.name/code/homesync/) (need to work on it). I have a list of files/directories to upload/download on/from my server depending where the changes are the most recent. A cronjob do the work (hourly), and I download last changes with a cron "@reboot", and make sure to backup changes using /etc/rc.shutdown