Obryn said:
In fairness, he said "regularly."
Man, if it happens once or twice or three times, that's too much for me. Considering that I am a growd-up with stuff to do, adding numbers until I can move on with the plot ain't my idea of fun.

I'll complain about a bad movie I've seen and that's just two hours of my life I'll never get back!
Obryn said:
It should also say, "...unless your DM throws an utter trainwreck of an encounter at the party which is guaranteed to turn into a grindfest," which your example illustrates.
Right, the "Mythical Good DM" solves all problems with a wave of their magic hand, healing all your games' ills in hindsight on message boards all across the internet.
Dude, my DM last night was no slackjawed doofus, nor does it take a bad DM to get a grindy 4e game.
Obryn said:
In 3.x terms, that encounter is the lich casting Disjunction after your party spends an hour and a half casting their buff spells.
Except in 1e-3e, the Lich then goes on to murder your party, thus ending the encounter before you've wasted the night spinning your wheels and getting nowhere.
In 4e, you're probably gonna win...eventually...sooner or later....just....any minute now....oh, guess the session's over, we'll pick up next week!
This isn't an all-the-time problem for every group, but neither was scry-buff-teleport or killer dungeon adventures. It's out there. It happens. It's not a statistical outlier. One of 5e's best selling points for me so far has been a dedicated effort to obliterating that, and it's clearly something this writer noticed as well. That doesn't make him a hater, it just makes him observant of his own tables.
And probably not a Mythical Good DM. But then I'm not sure anyone ever really is that, though so many people talk as if it's The Solution To Your Problems (regardless of edition -- I'd bet even Gygax has his share of this solution. I'm positive I do, too.).