I can honestly say the resources at LWN have helped my career immensely. The in depth series on topics like namespaces and io_uring directly allowed me to tackle some hard projects - without those articles I would have steered clear of "magic i don't understand" and the relevant projects would have suffered.
It's definitely worth subscribing if you have the means (and the low cost of subscriptions suggests a lot of readers here have the means).
Just to show support for corbet and his team. He could keep the articles paywalled forever, but is making them free after a week. Becoming a paying member is our way to say thank you for his fair attitude (and keeping ads at minimum level).
I work at totaly different field in IT, most articles are just "wow, that's interesting" for me and - I still keep LWN's subscriptionm and it is the only one I have.
Indeed. They even provide a mailing list you can subscribe to which will notify you whenever an article goes free. I think you need to have an account with them firstly though.