They are probably still in libraries somewhere (ironically, a worse-funded library is better as there’s less chance they’ve thrown them out to make space for newer stuff). The problem is locating them.

I obtained a archive of bound EDN magazines from a engineering library in the mid 90s I thew in bin because of lack of storage. I have regretted thast for years as Internet archive only has a few issues. Another such technical magazine is Dr Dobbs. IA only ever has a few issues ....