I have been into modulars for about 2 years. Euro is definitely the trendiest format but it also has a lot of innovation happening. Due to that and the lower cost of entry, it has been booming.for awhile.
Personally, I left Euro because there was always so much new GAS inducing stuff being released, I just wanted more and more. I also found the format a little too small, it was hard to not bump other knobs, plus there are some standards lacking- (power, amount of CV to trigger some modules is different, etc).
Now I have a couple panels of Serge, I have been really happy but lately I have thought about Euro again…because all of the innovation. I enjoy patching on my Serge more than I did on Euro (Banana Cables Rule!), I like the liveliness of the sound, the main downer is the price and that modules are bought by the panel.
Modulars aren’t going anywhere, the danger is that a lot of not very modular modules are being produced.