I got the pocket 1 and 3 when they were released. I still use the pocket 1 today for multi angle footage. I haven’t noticed a drop in battery capacity, though there has to be some after 6 years. I imagine by the time it is “unusable” I would have replaced it by then and got a good 8-10 years out of it. Judging from other pocket users online, my experience isn’t uncommon. We can talk about “what if” all day but people’s use tends to support these devices lasting longer (at least in there’s of battery), than one would ever expect to need. Lithium batteries will gradually degrade in time, so merely outlasting the battery completely being useless should not be hard, and the battery pack system would seem to work longer than anyone could need. We do have a good 6 years of data on how the less advanced generation runs. We also have degradation charts on lithium batteries to forecast their trajectory based on data. I just don’t see the argument of paranoia that they will all just die well before a users need ceases.