I started with electronics some 40 years ago, and back then I took an subscription to Elektor ("Elektuur", NL) with a student discount. I did two schools, and after around 8 years the discount ran out, and instead of paying full price, I stopped the subscription. There were some good projects, but projects were very much alike, and actually building a project was extremely expensive. But I did learn a lot from that magazine.
Later I took a subscription to the digital edition of CC. It was low cost, had some fun projects, and unlike Elektor, they had the source code for (nearly) all projects available. That was a huge difference from elektor. With elector, they put in a GAL where a simple TTL address decoder would have sufficed, just to make it more difficult to build a project without buying parts from them. When CC started "collaborating" with elektor, the cost of the digital edition doubled overnight and I stopped the subscription.
Over the years I've downloaded PDF's of old magazines. In total from about 15 different electronics magazines, and the time frame varies from back in the '70-ties and up to 8 to 10 years old for the newest.
IMHO magazines from before 1980 are less interesting. Then you're getting into the era when each transistor was precious. But there are also some interesting tricks in those old magazines. Magazines from 2005 or newer are mostly microcontrollers with some added I/O. These can also have (very) nice projects, but most of the value has shifted to the firmware. In between those years was the golden age of analog electronics.
Between all those old magazines, and a gazillion other sources on the Internet, there is not much incentive to maintain a subscription to a magazine.
Every now and then you can buy second hand collections of those magazines for a small price. That's a good option if you really want the paper version. If you're happy with the "digital editions" then buying back issues can be a good option. Either whole years, or all the back issues back to the start of the magazine in one go.