Current reports indicate that battery degradation is typically ~2% pa, and rarely, unless seriously abused, do they suffer major failures.
Most other EV components are simpler (motor) than ICE or very similar - long term reliability may be rather better, offset by the relative immaturity of EV control and power components.
Severe EV battery degradation is generally warranted for 7-10 years - I would suggest you understand with any EV you buy (a) how much warranty remains, (b) that the intended purchase is still covered, and (c) what you need to do in the future (eg: annual inspections).
Ability to charge at home and maybe access cheap overnight rates may be important.
I have just upgraded my car and chose petrol, despite fully supporting EV as the medium or long term future. The reasons relate to an accumulation of small issues, not one large one:
- range would be an issue a few times a year - a relatively long range large battery model would challenge affordability
- we do the occasional European trip - charging issues and prices are a bit of an unknown
- current low EV sales and rapidly evolving technology could leave model specific spares hard to source in a few years time (if needed)
- evolving technology (eg: battery chemistry) could impact model obsolescence making s/h value vulnerable if ever sold
- risks associated with ICE are limited - spares back up, trained technicians, fuel stations etc etc will be common for at least the next 10 years. Their decline will then set in!
Costs rely upon government policy. Current preferential treatment of EVs, and cheap charging is unlikely to last indefinitely - possibly only until the transition to RV is effectively unstoppable. Road charging is a likely revenue raising method to replace fuel duties on ICE as they decline.