By and large you still can do it via GUI. Launch client ==> check "Standard wallet" ==> Click Next ==> check "I have already a seed" == > Click Next == > Click Options == > check "Bip39 seed" = > Click OK == > Enter your BIP 39 SEED ==>Click Next ==> check "legacy (p2pkh)" (you may also change the last index in derivation path if u know what you are doing) ==> Click Next
He doesn't have to do that. Electrum allows you to create a legacy wallet without having to import any BIP39 seeds.
The only reason I can think of for somebody wanting to use a legacy address would be for message signing.
Why that? What difference would it make to sign from a segwit address? I have this query along with the Pharmacist.
Oddly enough, the bitcoin faucets that still exist (or at least some of them) only let you withdraw to legacy addresses, Cointiply being one of them, and that was true of Coinpot before they quit the faucet business.
Especially faucets are the ones that should use SegWit to reduce the fee of those large transactions. When I used to visit faucets, I remember they had a minimum amount for withdrawal. It was around 1000 sats IIRC. With SegWit, you could theoretically earn slightly more.