I would caution on using memory usage as the only indicator of system impact. I find people put too much emphasis on memory usage and ignore everything else.
In all honesty 500mb really isn't that much for most modern computers. Most computers sold within the last few years and going forward are coming with atleast 8gb standard, with many coming with even more.
Not saying to ignore it completely, because computers with 2 to 4gb of ram, it will be more of an issue for sure. However, cpu and hard disk usage will have far bigger impacts on system performance than memory usage in most cases.
As a comparison, most modern web browsers use 1gb easy, and can use even more depending on how many tabs and extensions you are running. Yet, people look at Chrome and Edge and say they are light and fast, despite their tendency to use a lot of ram (depending on how one is browsing).