I think open source contributions/projects will still be a way to gain verifiable experience.

Other than that, I guess developing software in some capacity while doing a non-strictly software job - say, in accounting, marketing, healtcare, etc. This might not be a relevant number of people if 'vibe coding' takes hold and the fundamentals are not learned/ignored by these accountants, marketers, healthcare workers, etc.

If that is the case, we'd have a lot of 'informed beginners' with 10+ years of experience tangentially related to software.

Edit: As a result of the above, we might see an un-ironic return to the 'learn to code' mantra in the following years. Perhaps now qualified 'learn to -actually- code'? I'd wager a dollar on that discourse popping up in ~5 years time if the trend of not hiring junior devs continues.