I just cut through a 6x6 pressure treated beam with my Ryobi brushless circular saw. Didn’t even bother to upgrade to a diablo blade. And it worked great!
I made six more similar cuts. No problem.
If I was doing this every day, would I upgrade to Milwaukee? Probably. (More than likely buy a corded saw.) But for weekend home improvement projects, don’t doubt the power!
There are 2 schools of thought, and both are situationally relevant.
Buy the 2nd last tool you will ever need.
IE, buy light duty. If it breaks and you’ve been using it a lot, you will likely know what features you want, how much to spend etc on the replacement. At which point you buy a more suitable tool.
Buy once, cry once.
If you are spending $200 on a tool, and the $300 is better, maybe just buy the $300 one.
Certainly more applicable to when you already use similar tools, and you need another.
I bought early into the Dewalt system based on people saying Buy Once Cry Once. But the problem is that it locks you into the ecosystem and batteries. Then even if I want a relatively light-duty cordless tool, I’m sort of forced to always go to Dewalt.
If you’re relatively new to DIY work and similar, I do recommend the first philosophy.