YES!!
So, did you go ahead and install Linux?
With it being 64 bit, it means you can address more than 4 GB of RAM.
As this is an older computer, you can add more RAM for not a whole lot of money - getting more life out of your computer.
Though, going by the age of your computer, you might also have an HDD and not an SSD. Upgrading to an SSD will make the biggest difference. You can get an inexpensive (like TeamGroup) SSD to install the OS on and it will speed up your system quite a bit.
That and RAM will make a huge difference. I'd say a modern system needs at least 8 GB to be comfortable. Though I much prefer 32 GB of RAM. I have a lot of stuff open at the same time.