I find having conversations with parents at school and the parents of their friends leads to the best results (so far, I’ve only been at it a few years for my kiddos so we’ll see I guess longterm). If you’re all vaguely on the same page it just seems to make things a little easier. If that’s not an option, then just don’t be the first person to buy one and when all their peers start having certain technology you give them access too, but you sit down and talk to them about it or find ways to restrict the faucet.
For instance, when it became clear YouTube was not going to be completely eradicated from my house, I just ripped a few videos and added them to my Plex server. They get to watch a little bit of nonsense content, but they’re not just getting flooded with more of it constantly (or ads). As a result those YT videos are just one among several things they watch. It isn’t special or all consuming.
Video games have also been interesting. Most of the parents I know have, like me, adopted to use older stuff and/or just not let them get on the Internet.
Ultimately at some point you have to do some combination of “controlling the faucet,” watching what your kids are watching so you know what’s going on, and ultimately educating them/giving them context to the media they are enjoying.
Third grade and it’s already happening: My kid has already had trouble in his social circle at school because we made him cut back his Roblox time by a lot. It’s not even that anyone plays at school, but supposedly almost all the boys (and many girls) are playing after school.
My kid is disappointed, but it's fine. She has friends play the games she does have and she has a lot of other games. She had a lot of other ways to socialize with them. I honestly don't see roblox as different than any other social fad. Roblox is just the default digital hangout spot for kids, but it doesn't have to be for your kid's friend circle.
It’s still up to the parent to enforce limitations even if you can distract them with other things.