Could having multiple apps open at the same time in iOS’s App Switcher affect iPad performance?

As a newbie, I read in this forum, often and increasingly, of complaints about screen freezes or intermittent, unexpected lags in performance, particularly with iOS 12.2. But I’ve just had an ah-ha moment — doing something myself — making me want to ask: Could having multiple apps open at the same time in iOS’s App Switcher affect performance?

Our iPads are incredible fast machines, but even I have noticed unexpected lags at time — which I’ve always attributed to “processing” lags, rather than hardware and/or software defects. But it’s rather infrequent, and I’ve it little thought.

Sometimes, when I delete an email, for example, if I decide I want to take another look at it, and go to the trash, on occasion there’s a multi-seconds lag before it’ll even appear in the trash can. I’ve even thought of timing it, as it seems, sometimes, it could take nearly half a minute for it to, finally, show up...

And, most specifically, most who’ve reported these ‘problems/annoyances’ have said, I believe, that when they erased/deleted/reset things, everything was okay — at least for a little while.

Which only supports my wondering...

With the barest of research, this article says with iOS 11 and 12, the control center and app switcher merged to assist with multi-taking. Seemingly, the complaintants seem to express issues revolving around iOS 12.2.

Additionally, the article states, further on, that “there’s normally no need to close apps on iOS because Apple manages the device’s power needs and keeps apps from using resources when not in use...”.

https://www.macrumors.com/how-to/ipad-app-switcher-ios-11/

However, I’ve never paid any attention to the App Switcher, and — except for this evening, which got me to wondering about things — I’m often stunned, when I do go look, at how very, very, very many apps — things I hadn’t looked at in forever — are still open, all at once, where I’d had no conscious notion of it.

So, as folks seem to state having freeze/lag issues, crop up again, after having them, successfully, totally removed, would it make sense that this issue “could” be due to processing lags?

Specifically, could having multiple apps open at the same time in iOS’s App Switcher affect iPad performance?

I realize almost everything has been tried, when this issue crops up, but have folks checked their App Switcher to see just how many programs they have open, simultaneously? I’m not aware of, specifically, reading that’d been done in the long list of other things tried...

I understand there’s ‘normally no need’ to have to close apps. But, perhaps, we’re not dealing with normal? And if processing power were the issue, wouldn’t closing unneeded open apps be so very much easier than the frustrating reboot that it’s said folks are doing each and every time?

Hmm... I’m thinking I’m going to be paying a little more attention to my App Switcher...