Yes, of course people will always look for ways around a law.. but if even 50% can't be bothered to go around it, that will be an enormous reduction in emissions.
"To equal the hydrocarbon emissions of about a half-hour of yard work with this two-stroke leaf blower, you'd have to drive a Ford Raptor for 3,887 miles, or the distance from Northern Texas to Anchorage, Alaska"
https://www.edmunds.com/car-reviews/features/emissions-test-...
This probably doesn't effect used /existing stock either.
My landscaper recently told me the gas ones are still far more effective. I assume he would know? They go from site to site every day, I’m guessing they don’t have time to charge and want the best tool for their job as all of us do.
You’re talking changing a hour job into potentially longer from battery swaps and asking for plugs, etc.
And in general the gas ones are cheaper but that is getting closer.