Summary: There are now many press articles mentioning the rapid demise of chatbots (by usage) but almost nobody mentions the many layoffs in Bing (lots this year) and erosion of excitement, along with market share (see above)
"In the United Kingdom, the Foreign Enlistment Act 1819 and the Foreign Enlistment Act 1870 make it unlawful for British subjects to join the armed forces of any state warring with another state at peace with Britain."