https://www.nerdwallet.com/article/hybrid-electric-cars-hype-justify-price
"For example, compare a hybrid that sells for $30,000 and gets 48 mpg with an identical gas-powered car that sells for $27,500 and gets 28 mpg.
If you drive 1,250 miles each month and pay for gas at $3 a gallon, the hybrid would save you $56 a month, and it would take you 45 months to pay back the premium, according to Edmunds. However, if gas jumped up to $4 a gallon, the hybrid would save you $74 a month, and it would take you only 34 months to pay off the premium. In this sense, owning a hybrid can provide some peace of mind because it’s insurance against future gas price hikes."
I just checked if the difference in price is reasonable - and it seems to be more or less so - A 2019 Camry LE MSRP is $24,350, a 2019 Camry Hybrid LE MSRP is $28,150 - that's $3800. The price difference of a RAV4 to RAV4 hybrid is just $3000 - so it kind of seems reasonable.
With this in mind, I would guess that a 5 - 6 years period will have the hybrid cover the cost difference for the average driver (people under 55, after that, the average yearly mileage goes down from 15K to 12K).