My kids and I have been big fans of superhero stuff for time immemorial, so I am quite happy for the MCU elevating the quality of superhero movies to the standard it is today. It's amazing that Marvel's phase 4 feels lackluster while a pre-MCU superhero movie landscape would have made watchers salivate so much they'd drown.
DC is making movies that meet the quality standard of pre-MCU as an example. Think of the Fox-movies or the pre-Disney Sony-movies. If those were the three big players we'd probably still accept it. Fact of the matter is: Disney has elevated the expectation of a superhero movie due to consistent delivery in quality and an unbelievable quantity. Pre 2008, if lucky there'd be one superhero-adjacent thing a year, and you'd watch it, and it'd suck, but hey, superheroes! Daredevil, Elektra, Spider-man 3, X-men 3, Blade 3, Steel, Catwoman, Batman & Robin. Were any of those movies good? No? Did we watch them? Well... I did. If a Justice League or even a Black Adam released against THOSE everyone would think it's the greatest thing ever. Sadly for them they released against the Avengers and the rest of the MCU.
The MCU now is safe. DC has no way of doing dethroning them any time soon. I hope James Gunn can revamp this DCEU in a slightly less insulting product, but in all fairness DC Mythos as a whole is a broken mess, so it's a toss-up. MCU is now in an experimental phase, superhero-x-horror, superhero-x-filmnoir, superhero-x-fantasy, superhero-x-thriller. A genrebending meta of things to try, to break the formula and reinvent itself. That's why phase 4 feels slow.
Yet, I think, it also lends itself to a new thing, where watching 'everything' is for the die hards, and where small niche-pockets are created for new people to join the fandom. Kamala Khan was (sadly) panned by small-minded fans, but she won the hearts of many youngsters and for the people who cared, showed off facets of a culture not everyone gets to see every day. Werewolf by night: ever thought you'd see a NEW black and white horror movie, on a disney budget? And my most debatable pick: She-hulk, or as I call her my green lil sister. The show was funny, meta, tried and, in my opinion, stuck the landing on many new things. We all enjoyed the show, the ending had us in stitches.
In conclusion: I can't wait to see what Marvel's experimental phase will build to, consider phase 4 a new phase 1 (who would want to watch thor 1 and 2 nowadays?) and I reallllyyyy hope that DC will get its shit together so that the competition will light a fire under both their asses.