There have been enough alarm signals and examples in the past showing why a comparable series like BTCC is still going strong and why DTM ceases to exist for the second time. It's just too reminicent of 1996 when the ITC died as the cars became too technological advanced with F1 tech and too expensive. When we think about late 80s and early 90s the cars resembled their average joe day life counterparts and you knew that they were an M3, A4 or a 190. Today, the cars look like spaceships and have nothing in common with the road cars, they all look the same, they sound sh*t and are as expensive as it gets.
If they followed the same approach as BTCC they would have no issues fielding more than twenty cars and it would garantue some great racing without those stupid gimmicks like DRS. Next to the fact that DTM is just too international. This might sound a bit nationalistic, but why does the German Touring Car Championship not race at tracks like Sachsenring, Oschersleben, Nordschleife or Bilsterberg, while they race basicly everywhere in Europe, Covid19 or not? Do you see the BTCC racing at Moscow raceway? Why not race at Tempelhof? Airfield races have been great in the racing history and many venues that we know today started as airfields. With this comes the problem that the traveling times and costs for the teams rise and that the German spectators have no access to the supposed to be prime German Touring car series. It all screams for failure.