Maybe a year or more ago this would have been more relevant, but the latest few updates in particular have really stopped any lags or need to regularly reboot for most people.
The few that do need to reboot, or are seeing lags appear to have something unique to their hub or setup. A root cause has not been identified yet, but I suspect that they are doing things like overwhelming their mesh with power reporting, using a community driver or app that is problematic, or there is some cloud integration that is slamming the hub. Not sure which, and while I am sure it is frustrating for these users, this doesn't seem to be widespread at all.
Again, this seems to affect some but not others. For the most part, Zwave works OK. Again there have been recent updates to Zwave stack and some behind the scenes changes, and it seems to have improved things. It is completely different than when the C7 came out in Summer 2020. So I won't look at those early posts about Zwave issues, maybe stick to the last 3 months or so to get a better feel for what people are experiencing.
The App stats and Device stats can do this. It isn't a graph, but still stats none the less. There is a community driver that can also gather hub information. [RELEASE] Hub Information Driver In addition, Hubitat recently added a warning that pops up when you have (to quote release notes) "A new alert for devices that produce 300+ events per hour. ". I understand from comments that they are tweaking this to give better warnings about things like this.
