I used to think that it would be a big mistake to leave the union.

However, for as long as you care to look back Wales has been one of, or the poorest parts of the UK.
I don't see that even changing whilst in a union with a member more than 18 times as big as us.
The focus will always be on how to help London and the South east and we will get the scraps.

Yes we get Barnett formula money, but that is all just spent on public services to treat the symptoms of having the oldest, poorest least healthy population in the UK.

Investment into infrastructure almost never happens because you always get more bang for your buck in London, so in the union we will always be a poor relation and always just treating the symptoms of our economy.

Ireland for many years were about the poorest part of the UK. They became independent 100 years ago this coming March, and since about the year 2000 have had a higher GDP per capita than the UK.
Had they not left the UK this would not have happened.