I see your point and for sure, delay in lights coming on is very annoying.
I wouldn't trust an unseen electronic x-former as far as I could throw it - capacitors fail and blow out; they overheat smoulderingly and quietly in the hidden spaces they get stuffed into. Out of sight, out of mind, as the saying goes.
Otoh, a simple wound x-former has a lot going for it (assuming it's decently made) but it's less efficient. Having said that, there are millions of old bell x-formers that haven't burned down their owners' houses yet; although I know for sure that it has happened.
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