It really depends on the quality of the kit and how well you maintain it. A good pool kit, like those from Intex or Bestway, can definitely last 10+ years if properly maintained, but you might need to replace the liner or pump at some point. As long as you take care of the water chemistry, clean the filter regularly, and watch for any wear or damage to the walls, you can expect it to last a long time.
Just know that all pools require some level of upkeep, and parts like the pump or liner might wear out over time, but nothing too major if you keep up with it.