I'm sure Public Mobile will do it when they have to do it.
But I'm not so sure they'll ever have to do it.
They'll stick with SIM cards as long as all the phones on the market can still use SIM cards.
As to what Apple and Samsung promise or what Apple and Samsung customers expect Apple and Samsung will do in coming years ... it's all hype, it's always hype, that's how they sell their products, have millions of people lining up to buy months before product launch.
They do deliver on the hype, usually, eventually. But they disappoint or change direction just as often.
The flagship OEMs aren't going to make their devices eSIM-only if their consumers will have too few options. The days of getting the latest-and-greatest iPhone/Galaxy from exclusive contracts with exclusive carriers are gone, there's too many other ways to buy those phones and too many buyers will be dissatisfied with a device which is essentially vendor-locked away from the carriers they prefer.
And they've become cautious about removing features now. People still complain about losing their headphone jack years ago, they'll complain about losing that SIM slot for years to come. You might or might not think it's unimportant, but the people in charge of marketing and advertising are deeply concerned about anything with tarnishes consumer perceptions of their brands.
What would Apple or Samsung possibly gain from removing the SIM card slot? No dependency on a new app or new thingy on their cloud or new accessory or new hardware. So I doubt they're going to rush this move until they can figure out a way to create revenue from it.
