Mac mini M2 (2023)  An M2 Mac mini - I think I have the Apple (non)capitalizations correct - was too good to resist. "Only" an M2 chip rather than an M2 Pro in this one, but that is plenty fast enough for me. It would be nice if Apple finally made the baseline memory more than 8Gb, though.

RPi 5  The latest and geatest ARM chip without the keyboard (or anything else).  Raspberry Pi OS still helpfully contains a free up-to-date copy of Mathematica and Raspberry Pi OS 64bit speeds things up a little bit.

RPi 400  An ARM chip inside a glorified keyboard connected up to everything else via lots of wires for less than a hundred quid - is this 1980? Odd that the mouse appears to be set up for left-handers.

ThinkPad X1 (2023, gen11) This one courtesy of my employer in lieu of an office desktop PC. Very enlightened of them, especially considering it is the 32Gb RAM, 1Tb SSD, i7 version running Ubuntu LTS. Not too much is broken by having it "managed" either.

MacBook Air M1 (2020)  With a sensible keyboard and ARM innards. The M1 chip is fast and the x86 emulation via Rosetta2 "just works" for everything I need. Also, to a good first approximation, the battery life is infinite. 

MacBook Pro 13" (2017) The version without the touchbar (good). Orphaned by macOS 14 Sonoma, but OCLP saves the day. 

Retina MacBook (2015) Featherweight, if a bit light on ports. Orphaned by macOS 12 Monterey, but OCLP again saves the day.

MacBook Air 11"(2013)  Back from the dead with ChromeOS Flex to make a very nice ChromeBook. Everything works except the webcam.

Dell XPS-13 (9305  version)   The 9305 is from a few iterations back but it still makes a handy Ubuntu/Windows laptop. It transplants newer 9310 innards into the old-style chassis of the XPS-13 9370, although it does manage to put the webcam above the screen.  

IdeaPad Duet 3  The second iteration of the IdeaPad Duet Chromebook. It is slightly bigger (5:3, 2000 x 1200, 11-inch screen) and quite a bit faster c/o a Snapdragon 7c Gen2 CPU than its predecessor.   It seems the orginal USI didn't quite cut it, this now has USI 2: Universal Stylus Initiative 2, one stylus to rule them all. 

IdeaPad Duet 5  Big brother to IdeaPad Duet 3  Chromebook.  It has almost the same innards,  but sports a larger (16:9, 1920 x 1080, 13.3-inch OLED) screen.   Curiously, the stylus technology is still USI (not 2) on this one as the pixel density is lower.

iPad Mini (2021) Out with the Lightning port, in with USB-C. In the usual Apple style you have to buy an Apple Pencil 2 to work with this one, the original roll-away Apple Pencil has had its day.  Now on my second Mini, the first got left on a plane into Paris CdG and was last seen (according to Find My) in a second hand phone shop in Tunisia.

iPad Air (2020) See above -  USB-C, Apple Pencil 2 etc. Hasn't been left on a plane yet.

iPad Air (2024) The change in the camera position to landscape means that the Apple Pencil 2 is no longer compatible, you have to go (Apple Pencil) Pro. For good measure this isn't backward compatible but, hey, you can squeeze it.

Samsung Galaxy A54 5G  Superceded by the A55 5G and consequently something of a bargain. Notionally it is a slight downgrade on my previous POCO F3 daily driver, but it usefully has eSIM capability and is also smaller (good).

Xiaomi Poco F3  More like the orginal Poco F1 than the F2 Pro so it offers performance at a very keen price, especially when bought at a discount.

OnePlus Nord   "Pretty much everything you could ask for"  according to the advertising blurb, which is pretty much correct. 

Garmin GPSMAP 67i   It looks like a scaled up version of an old-school feature phone from a few years back, and it has the long battery life to match. It also has Iridium connectivity in case I have to send for the cavalry in a no phone signal zone or want to waste time sending/receiving messages from the middle of nowhere instead of admiring the scenery.