The views expressed here are indeed very sensible and considered, and obviously based on relevant knowledge and experience — that in itself is refreshing during this time.
One of the characteristics of the tech scene and associated start-ups is the ability to be flexible and ‘to find a way’. The world is constantly changing and this is just another potential issue for everyone to deal with amongst lots of others.
If we leave, which I hope we don’t, they’ll be a period of uncertainty but that will be followed by everyone working out how they prosper in the new environment. As expressed above we have time and in 5–10 more years there will be something else to worry about.
Vote, have your say, don’t panic, remember what you’re trying to do & why, move on.