Same, Phrack was mind expanding for my teenage self in the 90s. Is there anything similar floating around these days? So much on the Internet seems filtered through corporate platforms that are antithetical to the counter-cultural spirit. Or maybe I'm just old now!
2600 is still alive and well and STILL mails me a quarterly physical magazine. $250 for a lifetime subscription. The article quality is all over the place.
pocorgtfo is pretty good, but it's more aimed at 'weird machines' than just exploit techniques. You can also buy a copy online that comes looking like a bible, which I rather cherish as a possession ;)
I own two editions of it and they are great! Just chok full of really, really wonderful stuff. Particularly the tomagatchi hacking articles!
I feel a little uneasy reading them in public, though. The cover has, in big, bold beautiful letters "PoC || GTFO" which might lead someone who isn't familiar with the binary OR operator and the use of PoC as "Proof of Concept" to believe I hold opinions that I VERY much don't.