I am getting old, I could barely get out of bed this morning after running the grinder all day yesterday... another reason I love air tools better but the electric have so more more torque to get the basic job done.
For what its worth,there is airtools that are awesome,but they tend to use more air than most homecompressors can supply and they are certainly not cheap. If you run into some real industrialgrade airtools and get the right consumable tools for your work at the right price if some shop is closing or something similar,jump on it if you have an airsupply that can handle it. Where i work with grinding and polishing stainless steel i use Atlas Copco airtools and some Pherd and they are seriously good,im using 3 machines and they last about a year before they start loosing speed(that is running them hard for 8 hours a day),have also tried 3M but they are far from as smoothrunning and makes more noise.