I am not going to say that with the European Disability Card is all much easier for us, but it really helps. In Belgium, my beloved country of residence, I successfully used it in cinemas, concerts, and museums – at the end of the day, this was an idea from the Belgian disability movement, and is the only disability card in Belgium. Still, much more places in Belgium should recognise it.
And in Italy (my last trip before the pandemic), I used it even in places in which they did not know about its existence! With a big exemption though: transport services. Even if the railway company had discounts for Italians and Swiss with disabilities, they could not recognised I had a disability – I even tried with the Spanish one too, just in case!