Avoiding the usual toilet paper and paper towel answers, Bluetooth speakers.
Decent sounding ones can be had dirt cheap, but I've found that ones made by power tool brands tend to last longer and be more reliable when abused. I'm more than happy to pay double price if it will last me 4 times as long before it fails on me. I haven't had my current one very long, but the last one lasted almost 6 years of genuine abuse before it died after falling into a vat of used motor oil. The usual life span for bluetooth speakers is about 6 months (general abuse) to a year or two (battery failure). I'm a bit rough on my kit.
Because they are a very good CDN and provide excellent DDos protection. They then expanded to do a whole host of other things, to the point where they do pretty much everything. Basically, they have become the first name most folks think of when they want to put something on the internet. A one stop shop for your web hosting needs. Wouldn't surprise me to learn they rent servers and VPS's as well.
Been seeing it in the selfhosting communities and subreddits for a while now. "Oh I want to put this selfhosted service on the internet. I should put it behind Cloudflare!" Most of the time it's not needed in that context.
Well, they did just take out "half" of the internet today so.... In general, if it seems like "everyone" is using a single service, it's probably a good idea to see if an alternative exists and will suit your needs. Which reminds me, I should probably start looking for a replacement for Tailscale. They're starting to look a bit like Cloudflare to me, in the sense that "everyone", including myself tends to recommend them as a VPN.