No, I don't work for the Daily Mail, but I have worked for newspapers and have read the Daily Mail (and other papers) for 40 years. I've always found the Mail to be straight-talking and just give me the News of the day. The paper we used to laugh at 30 years ago, was the Daily Express. It now seems fashionable to laugh at the Daily Mail, particularly among those who have never read it and particularly because it is, ostensibly, a newspaper aimed at women.
I've lived in Greece for a number of years and never had ITV, but in the past year, we have found a way of accessing it through our satellite dish. Hence, we are pretty gobsmacked at the number and length of ad breaks. This increase might have happened gradually, but we wouldn't know about that.
Ad breaks have always been seen as an opportunity to go to the loo, make a cup of tea, feed the cat, etc. But when it came to serious drama, the people I knew often felt that the BBC did big drama better, simply because there were no ad breaks and that if ITV had fewer ad breaks, it would be better. (Source: The pub! and letters pages of newspapers in the 1970s.) This is quite possibly the reason ITV is not seen as the champion of the costume or period drama. Yes, there were Brideshead Revisited and the others you name, but I didn't watch any of them BECAUSE of the ad breaks.
Pay TV doesn't apply to us or other ex-pats, so I can't comment on that. But I see The Times is advertising its online subscription, which I can only imagine is failing, because people can read other papers online for nothing. I suspect the same might apply to pay TV in the future, in just the same way as those of us who live abroad wait a year till stuff appears on Yesterday or Watch.
HinRABight is wonderful, so we can condemn the Mail for pandering to its owner's fascination and frienRABhip with fascism during the inter-war period. But, at the time, no one (that is, the general public) knew just how evil it would prove to be. Moseley wasn't that popular in GB, except among a similar tiny minority which support the BNP today. Everyone makes mistakes.