For something like circular saw, I think that's much less of an issue. I picture that as something you set up in a spot and use for the duration of the project. So I guess I am surprised it even comes in a battery option.
Didn't need anything better until a few years later and bought a big beefy Milwaukee. I still use the battery powered Ryobi for 80% of stuff though, just due to convenience.
That said, I see things like battery powered table saws and have zero desire to mess with any of that.
For "pro" use on a job site, it's hard to imagine a battery powered table saw having enough power or endurance. I know my plug-in table saw seems to use at least ~1,200 watts @ 120v when cutting something tough like pressure-treated lumber, because it trips the surge protector.
But, I don't know. I see Dewalt has like a 60V powered table saw. With a big enough battery maybe it's enough to be useful for pros.
They're worse for run-time, of course, batteries get drained. Endurance is the issue, but battery powered tools can beat corded tools for power these days.
If you're going to a job site with limited electricity and don't know the exact cut of wood you need before arriving, I can see value. This option isn't for medium/large workloads, and isn't for the guy operating a wood working shop, but might be for a guy that does small jobs away from a shop.
Cable management can also be annoying sometimes when moving around.
I believe you are confusing a handheld circular saw with a miter saw. A miter saw has a base, an arm, and a blade guard; and must be placed on a flat surface/table to use it.
A circular saw is a handheld tool.
https://www.milwaukeetool.com/2736-21HD
https://www.milwaukeetool.com/Products/Power-Tools/Woodworki...
(some of the table saws from other brands are "duel fuel" and can take a battery or a plug, can be nice).
Battery power table saws seem a bit silly until you realize that the construction people often arrive before there's any site power at all, after all, someone has to build the site power connections.
But this was a straightforward way to get a bunch of reasonable quality tools cheaply and I've honestly used all of them without any failures, so it's worked out.
And a making a wireless tool wired should be doable from a technical standpoint.
None of these are incredible tools, but none of them have failed on me. The only thing that's died is one of the battery packs and I replaced it with a larger one since the included ones were pretty small. Pretty sure I killed it by using it with a more demanding tool not included in the package.
In retrospect, I'm thinking the cheapo deal was a way to get people like me - just bought a fixer upper house and looking to do some light-to-moderate DIY work - invested in their ecosystem. Well, it's worked. When I need other cordless tools, I get more Ryobi since they work with the same battery packs. Grinder, hand vacuum, etc. have been the same brand.
That said, I've needed higher quality tools as well, and when I got a better circular saw and a big hammer drill, I went corded and had the benefit of not worrying about battery brands. Probably should've gone corded for the grinder as well (it kills battery packs quickly).