I've always assumed keyboards and electric pianos (except maybe super-cheap 'toy' ones) are designed to last virtually for ever, or have a life-span similar to a real piano. Probably because I'm used to musical instruments like pianos and guitars, that will last for decades with a little care and can be repaired when bits wear out.
But looking at other electrical products, this would be uncommon - even white goods often fail around the 10-15 year mark. With anything computer-based, you can't get in and "replace the tuning knobs like on a guitar".
I'm starting to consider buying something - I don't want the bulk and weight of a real piano - but for something as potentially expensive as this I would expect serious longevity. Is it something that can be expected? Do such products have a lifespan and one should expect to replace them, or can/should one of these things last you a lifetime?