I’m using the new Raspberry Pi4 with 4gbs of ram and I have it booting of off a 120gb SSD drive, with the drive it boots up 5-10x faster than of off the micro sd card. I’m using it with Kstars/EKos for my visual and Astrophotography needs. The system works great because it only needs 5 volts and less then 3 amps to run it, it’s great for a portable set up. I connect through either my IPhone or android tablet thru VNC viewer, the only down fall I see is that sharp cap isn’t available on Linux so I do bust out the laptop to get polar alignment, you could do thru PHD2 but I like sharp cap better, EKos also can plate solve as long as you have an internet connection. But so far I like the setup, it’s light and amazingly pretty powerful for something no bigger than a credit card. I also run the Astroberry version of Linux which is Raspian with astronomy software installed for you, as well as INDI, so no messing around with ASCOM and drivers.
Meade LX 80 6" SCT and Meade DS 114mm Newtonian
Meade 2nd Digital Series Goto mount with 497 bandbox
ExploreScientific Exos II with PMC-8