Would the following be sufficient to flawlessly run Bitcoin Core on a new laptop:
128 GB RAM
2 TB SSD
16 Core
This system spec is more than enough to run your Bitcoin core 24/7.
If you are still having issues when you have this system spec, then try checking the performance level of the CPU. Sometimes high usage will slow the system down, maybe you are running other solidarity programs.
128 GB of RAM is overkill and doesn't need to spend that much on hardware. In my opinion, laptops with 32GB is more than enough to handle intense tasks, including running core 24/7 along with Mempool.space interface running in parallel.
If I am not wrong picking the right hardware combination along with the optimal cooling system get the best performance on average running time instead of going for the most powerful one, which is wasting more money than needed for the task.