This is the future. U2 know it. Scared to death. Hence - silence.

That is not what the Las Vegas shows looked like. U2 soldout 40 arena shows in Las Vegas not too long ago.
The Rolling Stones in their 80s soldout 20 stadium shows in the United States in 2024.
Just because you can't beat Taylor Swift and Coldplay in attendance and gross anymore does not change the fact the majority of active music artist would never be able to get as many people to an arena or stadium as U2 could.
Doing a limited run residency in one city is a very different proposition versus touring the world the way U2 have been accustomed to doing.
40 shows in a 20,000 seat arena in one city is not a "limited run". It could be the record or if not very close to it. I thought U2 at best would be able to play 10 shows in a 20,000 seat arena in Las Vegas. That band thought that too as they only put two shows on sale initially. 40 shows is absolutely astonishing as it means 90% of the fans probably booked Air Travel, hotels, time off, in order to do all that.
U2 played to 663,000 people which is more than the number of people they played to on the 50 date North American Unforgettable Fire tour back in 1984/1985. That was one of the top 10 tours of 1985 in North America.
How many artist have played more than 40 arena shows in a row in a 20,000 seat arena in one city? Very few if any.
Even though it was technically a residency and not a tour, the gross of $245 million puts it in the top 75 grossing tours of all time.
Most residencies in Vegas are done in much smaller theaters or clubs. When you only have to sell 3,000 tickets for a sellout, its easy to a residency. But when that number is 20,000, that is difficult if not impossible for most music artist to do.
That's one of the reasons Vegas was so appealing to them. And they did it on a legacy album.
For U2, the appeal was the venue itself and the new technology. Originally I don't think they contemplated doing more than ten shows. They went to 40 shows because of the massive demand.
No disrespect to them - they deserve props for selling those shows out at very high prices.
But we'll see what happens if they attempt another proper tour based on a new album.
The graphic you posted suggest there would only be demand for a club tour, less than 1,000 people per night. I'm sure the band will be able to comfortably do a global arena tour just like they did on the Unforgettable Fire Tour or Elevation Tour, with most if not all nights, soldout.