Earlier quoted context omitted.
> its complete detachment between spelling and pronunciation. Whose dialect are you going to choose to render phonetically? Mine from the West Country, or that of my friends from Newcastle? Will you standardise on short a in castle (Newcastle upon Tyne, North East England) or long a in castle (Restormel Castle, Cornwall)? Or should each person just write phonetically so that we have millions of idiolects?
And then since pronunciation shifts, you’ll periodically want to have international treaties adjusting spelling, hyphenation, capitalization and other rules, as the German-speakers have done. Or freeze it once and for all as the French have chosen to do?
Dutch seems to be quite the opposite: spelling changes a lot. The best way to read old Dutch texts is to sound them out in your head, because the words look totally different, but they sound the same. Hearing medieval Dutch is probably easier than medieval English, but medieval English is much easier to read.