These days, not really.

Nope.

Why these days?

Not really, as long as you have a good Bluetooth signal. My pc had a shitty Bluetooth signal but I got like a USB Bluetooth adapter thing for like $20 that gave me great signal. If it's a laptop you are definitely fine.

Technology has improved vastly since the optical mouse was a common standard.

No

Years ago wireless nice had higher latency so wired was preferred for competition etc. It really is not any disadvantage to have a wireless mouse with the technology of today

for me personally it's the weight of the mouse with battery, AND the need to mind the charge, both of these disqualify wireless k+m from my gaming. for work wireless mouse is cool no prob, but i don't work using my logitech mx518 :D

I would argue it does depending on the game, I played league and osu on a wireless mouse and could definitely tell!

For the most part though it's fine!

Nope. They work well with today's technology. I have the razer Naga pro and it's good to me

Usb is not bluetooth. Usb uses RF and is much better

I know I have a USB Bluetooth adapter...because my pcs Bluetooth only had a signal range of like 3 feet.

I got a g pro x and it feels better for me when theres no wire dragging on the table and it feels more free

Not really. Just keep it charged. But I’m not a pro gamer so maybe it does and I can’t tell.

How much lighter is your wired mouse than something like a Logitech superlight at 63g?

i don't need that expensive a mouse, i'm fine with previously death adder 3.5 now mx518 and will keep buying that one as long as they make them. that one is perfect shape size weight for my hand/palm.