I have all i7 systems and I cannot detect any meaningful difference between a soft that causes 6% and 25% browser launch slowdown.Test Bitdefender Internet Security 22.0 for Windows 10 (181491)
On a high-end system, like you said, 23% slower launching of popular webpages by bitdefender. A significant slowdown if I don't say so myself.
Norton slows down the browsing of web-pages on a high end PC by 14%
Test Norton Norton Security 22.12 for Windows 10 (181416)
Avira seems fairly fast here with only 6% slower launching of popular webpages: Test Avira Antivirus Pro 15.0 for Windows 10 (181480)
However Av-Comparatives indicates that Avira has a significant performance impact when downloading files: Performance Test April 2018 | AV-Comparatives
Which is odd, because AV-Test shows that Avira is relatively quick at this, and probably indicative that the performance impact differs from system to system. But this begs the question. If Cylance can match and beat the detection rate of these products without this kind of negative performance impact why use this type of protection at all.
People with high-end PCs, particularly in the enthusiast markets are paying several hundreds of dollars for 10%+ performance. How do you think they feel about losing 14% of that to their anti-malware?
Protecting against undetected malware sounds like the webroot approach. It's not without merit, but I'd much prefer something with a high initial detection rate because I feel like remiditation is a fools game at best. I would much rather be notified post-infection and start over fresh.
When you're dealing with seconds, 6% and 25% increases are still small numbers not very detectable by most humans. Most people don't care one bit about the slowdown even if they are on a $2,500+ dollar system. In fact, except for one or two, they are thinking about such things. They are lucky if the even bothered to install any security softs.
I've used Cylance. I've had subscriptions. It's a standalone antivirus that does not provide full protection.
If you want the greatest protection with the least system impact and annoyances, then SRP is the answer. It always has been.