My wife texted me on Friday as she was visiting her mother six hours’ drive away. She needed her laptop. They do not own a desktop, and her dad was at our house on a business trip with his laptop in tow.
Do not underestimate the utility of just outfitting houses that you/spouse spend a fair amount of time at with at least functional computers and such. I put MoCA and three access points in their house as a Christmas gift. It cost me $500 and about two hours of work, but I have never gotten another call about bad WiFi. I bought an AppleTV for their house just to have a Tailscale endpoint. I think they will eventually end up actually using it as an AppleTV, but until then, it’s my door into their network (and another private VPN service for me).
My 2008-era spare laptop isn’t snappy, and it’s not in good shape. But it boots Windows and Linux, and in the absence of anything else it can at least SSH and web-browse, write a USB drive, etc.