The move from Dslr to Mirrorless is fully underway and unstoppable.
What we are all talking about is the "froth" at the interchange caused by this move.
There is no clear winner as to which has the most "Best" features... but the movement is only one way ...
And that is toward mirrorless.
When we individually decide to change to mirrorless is far less clear cut, and depends on a number of factors. both technical and financial.
On the technical side, the decision to move over, will depend mostly on the combination of features that "we" consider "Vital" to our needs.
On the Financial side, we have a more complex balance between, Available cash, which might include the resale value of our existing kit, but also take into account the rate of fall in that value, as more people move over to mirrorless. And the high cost of such a move.
It is inevitable that at some point manufacturers will make the decision for us. That will happen when it is no longer profitable for them to sustain DSLR manufacture. they have already passed the stage where further research and development of the DSLR is reconcilable with possible future sales.
The "froth" I mentioned at the start, represents the people who test the water and find their change, for one reason or another, was premature, or people who get it wrong and+ find the system that they have bought into is not for them. Brand loyalty seems to have failed to have fully bridged the gap between the two systems. not to mention the people who have bought into and out of the same system or camera more than once.
Decision making seems to have become stretched to breaking point, with users often blaming their indecisiveness, and vacillation, on the equipment, rather than their own decision making processes. It is clearly as easy to move over too soon, as it is to wait too long. The very rapid introduction of more and more advanced and more capable models does not help in this.
Since the advent of Digital cameras, I myself have bought three early compacts , (two Canon G series and one Minolta) one Canon Dslr, Three Fuji X compacts, and two interchangeable lens Fuji X mirrorless cameras ... I still have them all...they were, and are, all very capable cameras.
To hedge my bets I still have A full Olympus OM1n film kit in fully working order. But that is now ancient history.