Folks, this post should never have gotten to the "I got this" and here's why I do not have yours discussion. It's like I eat and grow mango and here's why you're selection can be wrong, it's just silly. But since it HAD to go sideways consider these issues:
IF you factor in NOT having a gas powered leaf blower, or chain saw, or mower, or a host of other things that run on gas which eventually need expensive repair or replacement and then compare to battery powered stuff it's a toss up and in your ball court.
When I ran out of mower gas, sure I "could" unsafely dump it from my trimmer, weed eater (if it they were 4 stroke) or other appliance OR jump in the car and buy gas, but if you like some of us have multiple battery powered devices we can just swap batteries and go forward. For us replacing gas with Electric is sensible AND I can mow at midnight and not disturb anyone :-) Like many others deciding on my sub $300 battery powered mower was a no brainer.
There's no doubt that for larger plots, acreage, commercial users, or power mongers that gas is and will be king for many years to come.
Lastly since Lithium Ion battery technology has pretty much become the De Facto standard for battery powered devices (including phones, EV's and tools, portable computers and more) I think expecting 10+ years service or replacement support is not unreasonable to expect. My 10+ year old 14v and 18v Hitachi tool sets are still going strong AND replacement batteries (or rebuilding one) are inexpensive and readily available.