You will find both are very similar to each other, especially for common tasks. See: https://www.openbsd.org/faq/
I have OpenBSD on a R51e and had it on a T61. No issues except sleep and resume. R51e fails, T61 works except on resume you loose your USB ports.
Now NetBSD works great on the T61, no issues. The R51e I kept with OpenBSD.
Also note this quote from OpenBSD: "... only easy and critical security fixes are backported to i386"
Nice, but how did I miss this undeadly article!
For OpenBSD, as long as the computers have the same CPUs and you are using the standard kernel, I doubt any changes are needed. I have done this many times without issues.
But, at the very least you should do a fw_update
I had a hard time getting into it too, but I got to it. So I will paste it in.
From: https://lemmy.dbzer0.com/post/24552643 via https://lemmy.dbzer0.com/u/joes
The number of participants stayed the same. There were 2722 more tournament games than last year, the proportion of all games played went up 6.6%. 9 fewer people ascended 13 fewer games, with a higher ratio of 2.9 asc/player. There was only 1 ascension in Fourk, Dyna and 1.3d. 81% of games were scummed, 58% of all scums that month, basically split 2:1 between 31PwnMoat (again) and hecatonheir (last year it was dedal). Medusa was killed 87 more times, again mostly by Valkyries, but also dwarven Anachrononauts. 3.7 was played even more, dnh gained 7 ranks (+3.9%p), Un lost 4th place to HackEM (-4.9%p), Splice stayed in 3rd place, Spork/Fourk were played least, but 1.3d shot up 4 ranks from last place. On the australian hardfought server 8x more games were played.
And a comment from https://lemmy.dbzer0.com/u/joes
Clan DeepCavernGoobs managed to break all conducts in 19 games. malor ascended 11 variants; Merlek killed Medusa 9 times, only ascended 4, but got a trophy in all 21 variants. Only Umbire ascended 1.3d (uncrowned). jonosmalls and smurphy ascended Unnethack (jono even without Elbereth [also in xnh], killing all Riders and Baalzebub). Splice: finitelycraig got the Bell, stoicjin the Luckstone. Spork: Muad got the Bell, bleeko entered Gehennom. Grunt: Merlek killed Medusa and got the Luckstone, hothraxxa finished Sokoban. hothraxxa ascended NH4 without killing Vlad and the Quest nemesis. Fourk: recuerdo ascended, fitsf killed Croesus. FIQ: oh6 escaped in celestial disgrace, Merlek splatted on the Planes, Umbire killed Rodney. hothraxxa ascended DynaHack, bleeko reached Gehennom. fitsf and malor ascended SLASH’EM, ocnda escaped in disgrace. disperse and malor ascended SlashTHEM. Dictyostelium entered the Quest in HackEM. anselmus and malor ascended AceHack, ais523 and recuerdo splatted on the Planes. Noisytoot killed Demogorgon in nndnh.
Nice, I have NetBSD v10.0 on my Thinkpad T420, and issues I had with an external monitor has been fixed plus is is more zippy.
The only remaining issue I have with 10.0 is when the system is under very heavy load, Xorg can get temporarily corrupted after about 1 hour of the job running. I create PR 58217 for that issue.
In reality, I think very few people will ever run into this problem, but hoping for a 10.x fix some day :)
Maybe post the question here:
https://lemmy.sdf.org/c/retrocomputing
Someone there may want it for parts.