>The honest assessment: If the machine cannot run a lightweight Linux desktop at a usable speed after you have applied the optimizations in this guide, it is time to recycle it responsibly. Most municipalities have e-waste collection programs. Do not throw it in the trash. The components contain recyclable metals and toxic materials that need proper handling.
This is the whole point.Linux helps in that judgement whether to keep or throw the box.
Agree with you.
Linux itself is a good OS, even better when you have an old machine to "revive". But when even Linux can't run properly, time ditch it...
Or sell it to the retrocomputing community for a decent amount of $$$.
I also agree. I'd say we're at the last few years of Core 2 Duo machines being usable. Anything before them is just not worth keeping around. Not only are earlier machines slow, but are going to be pretty energy inefficient. Buying a newer system might actually save you money when you factor electricity costs.
For example, a 2009-2012 era Mac Pro draws more power in sleep than a modern Mac mini/macbook Air draws under full load.