The grandparent comment was basically saying that most (all?) travel stopped 5 years ago, when presumably they had kids.

So at least for some people, based on the fact that they stopped traveling, it is difficult :-)

I believe that is more a choice than a given.

Its about how selfish one is. Sure we can cram our tiny kids into plane to Japan and do that trip we planned like there is no tomorrow. But if you know a bit about child's mind you know how stressful for them that whole experience would be.

Eh, I guess, but I look back on traveling as a kid as one of the best parts of my childhood. I was bored as hell on the plane but I got over it.

Well, I'd just compromise.

Travel locally, by car. Trips of about 3-4-5 hours should be doable, for extended weekends or week long vacations.

You probably want school-aged kids if you really want to go far across different time zones.

But more expensive (4 plane tickets instead of two, for example).

It's all relative I suppose. It's a hell of a lot harder than it was! When I travel with adults I don't have to worry ahead of time about handling poop or bringing multiple changes of clothing or buying twice as many tickets or booking a room where it's OK if my kid is screaming for half the night because how do you get a wildly jetlagged 2 year old to sleep? They can't get vaccinated yet either so that's another source of stress too.

My experience is it is easier to go with the flow (with kids), so if the 2 year old can only adjust 1 hour of jetlag per day then you start with going to sleep at 4am and work your way down.