Still running a 2500K here too, paired with a GTX 1070. Absolutely no qualitative issues with any games I play. Interestingly though I do notice its age when programming - builds take noticeably longer when compared to my work laptop (XPS 13 w/ i7-7700). Could be due to the higher core count I guess (not sure what level of parallelism my builds exploit beyond the parallelism offered by Make).