I have had the same experience as calher. The X60 is just a software boot--you can honestly libreboot that model just by copying and pasting and believing in yourself. The libreboot documentation has not quite caught up to all the worki the libreboot devs have been doing, apparently, since I have never had a problem with any of the X60 tablet models that are still readily available on eBay for $20-$40.
One gig of RAM is going to make you feel like your grandmother, two is sufficient for T7 Gnome Shell, Thunderbird, Icecat, etc. and go ahead and max it out to the full four gigs if you want to use it as an eReader and have a lot of .pdfs. The X200 and T400 are going to involve a bit more screwdrivers and hardware knowledge, but acquiring that knowledge sounds a lot more enjoyable than other things you could be doing with free time if you have it. As far as the future, two interesting projects to keep an eye on are the Talos II: https://trisquel.info/en/forum/talos-ii-secure-workstation-raptor-engineering https://trisquel.info/en/forum/raptor-talos-will-make-lower-priced-mainboard-if-you-buy-10000 and the EOMA68: https://trisquel.info/en/forum/future-libre-computing-crowd-funding-campaign-starts-now What is happening in mainstream computer sales and marketing is not sustainable. I hope you have time to look around and get some sort of comfort from seeing the possibility of a different future. As your X60 (or whatever you are currently using) becomes older, you will also grow and learn how to use less resource-intensive software that may take a bit more practice and skill and probably gain some skills tinkering with the screwdriver because....well, it's fun.
