Surface Laptop systems emphasize portability and build quality, but repair decisions should be driven by battery/charging reliability and the cost of screen work. If the device is relatively new and the issue is limited to a battery replacement, SSD swap, or keyboard/trackpad service, repair can be cost-effective and preserves your setup.
Replacement is often the safer choice when symptoms suggest charging-circuit faults, repeated overheating throttles, or intermittent boot issues, because those can require board-level work and carry higher uncertainty. Since Surface devices can be more challenging to service than some business laptops, obtain a firm quote from a reputable shop and compare it directly to the threshold.
If you're near the average lifespan and need multiple major parts (battery plus display), replacement usually reduces downtime and future risk.