From my perspective, this is a blunder in the new edition. There are creatures that had an iconic element in their ability to be unaffected by nonmagical weapons. The Jackwere, for example, was a creature that could be encountered at low enough levels that PCs had no magic weapons - and that required the PCs to 'solve the problem' of how to handle them.
This new edition wilts beneath the idea of problem solving. It says, "Hey, we don't want to present a challenge to PCs that does not have an obvious solution." To me, that misses the mark.
I'd rather the 2025 edition Jackalwere maintained the old immunity to non-magical weapons. In the alternative, I wish it was immune to all piercing, slashing and bludgeoning. This move to having no immunity, or even resistance ... is just stripping it of a defining characteristic. To me, that is on par with removing the ability for a Medusa to turn someone to stone.
Needless to say - there are quite a few monsters in my games that sport additional resistances and immunities in the new edition - just like many of them have enhanced vision other than darkvision (like low light vision, infravision, ultravision, sonar, etc...)