Yes, I think Celtic and Rangers would be Championship level. AT THE MOMENT.
I also think they wouldn’t take long to get up to the Premier, certainly not ten years.
It’s all about money, mate. Celtic aren’t bringing in the money playing in Scotland, if they were in the Premier the money would go up exponentially.
It seems like £100,000,000 is becoming the norm for elite players, £60/70 million for average players.
Celtic simply can’t compete with that while playing in the Scottish League.
A sad state of affairs, but that’s the way football is now.
Cheers.