I'm a fan of the Kafka/Daddy Rich school of though that it's better to take and not need than to need and not have when it comes to the additional capacity of automotive batteries. Paying for gel batteries? Nope Unless it's a vehicle that takes a lot of vibration damage it's not worth it. But for Lead Acid batteries with increased capacity? The cost is minimal and absolutely worth it.

There is IMO a narrowing rage of vehicles in tepid climates where I would consider the additional capacity to be merely optional. These would be late model vehicles without infotainment systems that place a parasitic load on the batteries when not in use, but they're quickly slipping into the same category as our cars in question due to age. A classic car, particularly a project vehicle that either doesn't get driven on a daily basis, and/or is going to be subjected to long repeated cranking due to repairs is absolutely going to benefit from a larger battery.