But there is progress; it has standardized on frequency and (sort-of) voltage. https://en.wikipedia.org/wiki/Mains_electricity#Standardizat...:

“Until 1987, mains voltage in large parts of Europe, including Germany, Austria and Switzerland, was 220(±22)V while the UK used 240(±24)V. Standard ISO IEC 60038:1983 defined the new standard European voltage to be 230(±23)V.”