This OpenPGP and GnuPG criticism is brought up regularly here, but the proposed alternatives come with their own downsides: some of those are proprietary, some are centralized systems or depend on such. In addition to all the inconvenience, when such centralized systems are blocked, casual users switch to explicitly backdoored options. The advertised IMs are tied to phone numbers, introducing both privacy and availability issues. Almost nothing of that is available from Linux distributions' system repositories. Integration with other software and infrastructures is lacking. Dealing with multiple specialized tools is more of a headache even for expert users, especially when their added benefits do not make much sense given one's threat model. OpenPGP/GnuPG is more resilient and versatile than those, still usable where those are not.

I think such an article would seem more convincing, at least to me, if more sensible alternatives were proposed. Ideally without the advice to not encrypt email, without assumptions of continued availability of all the online services, of trust to certain third parties, and so on. Or it could be just a plain criticism without suggestions, which would still be somewhat informative.

Edit: there is another list of alternatives in a sibling comment, advising against (well, actually being quite hostile towards, and generally impolite) usage of what I had in mind as one of the possible more sensible alternatives: XMPP with OMEMO. Though upon skimming the criticism of that, I have not found it particularly convincing, either, and it just looks like some authors try to be particularly provocative/edgy.