They have a very elderly support base right? Because that's what to look for if we're looking for 'possible RIP' rather than 'LOL rollercoaster of a party' or even 'structural decline but still deffo relevant' or whatever.
One could argue that going from 41 seats and #1 to 21 seats and #4 and, two years later, to 13 seats and #5 does fit the "RIP" timeline, but you're right.
Still, if one keeps in mind just how powerful the party used to be not only in terms of electoral support but also as the pivotal party within the Dutch party system, and if one assumes most CDA voters are, indeed, pretty old and often won't be there in 15 years, and if one takes into account that "still deffo relevant" nowadays even applies to parties with 2% support, such as the Animal Party and the SGP, I do think it is appropriate to bring up the CDA in this thread.