I think if your primary interest is portraiture or landscapes then the switch is well worth it, but do it bearing in mind that the cost of good quality lenses is significant. If you are more field based (like I am) I'd go DSLR, but if you are more studio based then mirrorless is probably the way to go just because of battery life.
Thank you, this is very helpful. Battery life was another big concern I had - the Z6/Z7 are rated for something like 300 shots per charge, which might not be enough o make it through a full shoot in some cases. I've heard in practice it is much better, but I'm used to around 1000 shots before my battery runs out as long as I don't chimp too much. What has your experience been like?
Battery life on a mirrorless is VERY different than a dSLR, and much shorter.
You need to change how you think and plan for battery life.
With a dSLR, it is not draining much power until you press the shutter.
With a mirrorless, while the camera is on, the EVF is sucking power, and the processor is running the video to the EVF.
With my D7200, I can shoot all weekend and Monday and still have battery power left.
With my Olympus EM1, I will drain the battery to empty in 4 hours (continuous ON), 2-1/2 if I use a power sucking lens.
Where I did not carry a spare battery with the D7200, I carry FOUR spares with the EM1, to get me through a FULL day of shooting. And that is only ONE day, the next day of the weekend would need another four or five, for a total of NINE or TEN batteries. So I have to charge every night, using at least two chargers, and charging in two shifts, to start the day with all batteries fully charged. Definitely a logistical issue.
Based on my experience, mirrorless battery life is not based on number of shots, but on POWER ON TIME.
Example1, I shot about 2,000 shots at a tennis meet, but in less than 2 hours. And I still had battery life left.
But, at a basketball game, I shot less than 800 shots in 3-1/2 hours, and the battery went empty.
Example2, On vacation, I could reliably predict when I would need to change batteries in my EM1, at 11am and 4pm +/-. About 4 hours of continuous use. It did not matter how much or little I shot.
I don't know what the battery life of the Z6/7 are like, but you get the idea.