This is probably the only reason of why i would buy a trezor/ledger if i was in his shoes, if he has a few bitcoins,
now he is going to receive bitcoin cash + bitcoin gold, and bcash is worth a lot right now.
And a bonus: since you didn't move your money, you'll have for that address some Bcash, Bgold and whatever other forks they did/will do.
It depends, maybe if he move his funds to a wallet that has segwit intregated he will spend more time and money trying to move those funds.
All those wallets that have segwit are the real glory.. I have probably saved more than $250 since i have segwit on my wallet.
* the network is busy and this makes the fee/kb get high.