A couple quick questions on wallet upgrades:

So I have read the article on the Legacy wallet, Lore Wallet, and More Wallet.

Of course I saw that it recommends moving the coins to the newly created wallet, rather than simply moving the wallet.dat

This in mind, what sort of issues might one encounter is they start a wallet.dat created using the Legacy wallet, using the More Wallet?

...and can the created issues simply be corrected by generating a new address in the More Wallet and moving the funds internally?

Just curious what issues either of these might create for individuals attempting these alternative methods...