Not sure if you read the article in detail?
‘Right now, EU citizens are only EU citizens because they’re citizens of the United Kingdom, or Germany, or France, or of one or other EU Member State. So, it’s an inconvenient and unwelcome fact that when the UK ceases to be an EU country, we cease to be EU citizens.’
‘But there is a way to square this circle. The EU could allow individuals to become citizens of it directly. They could decouple EU citizenship from citizenship of an EU Member State. Initially at least it could be a special case, only applying to citizens of a departing member.’
But having it supplements my national passport/citizenship and adds more rights.
If I had to choose, I would drop the UK passport and join an EU one, if they would ever consider it (who knows what might happen in thr next few years).