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It is saving, delaying a purchase that would be financed out of debt until you accumulate cash allows you to save on debt interest. Alternatively, if you already have the money you can invest them for a while and earn interest.

Come on, the computer industry existence rely partially on cyclic purchases for that exact reason. My neighbor got a brand new SONY laptop so she could do .. everything I already do on my 2007 ThinkPad. And she can't so she pays me to fix her system from time to time. It's not far fetched to say that different OSes can and will save you money.

sure it is. if you buy new hardware on a regular schedule (e.g. every 3 years), extending that cycle out (e.g. to every 5 years) saves you money.

And you can do things like refresh (say) the one third of the desktop computers that need a higher spec (Cad, Video &c) every two years and then 'hand down' the older boxes to the other two thirds in stages. Worked quite well in one College I worked in a few years ago.

It is, hint: time value of money.