Do you have an old laptop that you would like to replace with a new one? Well, have you considered replacing the old HDD with an SSD?
I did just that and it made a massive difference in my laptop's performance. It's like a brand new thing. All the tech of GPU's and CPU's were steadily improving while the hard drives were pretty much standing still.
This is why HDD is a huge bottleneck for older laptops as all the components can run faster, but the hard drive just can't keep up.
In this video I talk more in-depth how changing the hard drive in your laptop can improve things.