Switch won't reach 170mil, pretty confident about that
decrease is sharp (not doom&gloom here, but YoY% drop are over there and it's not weird they decrease also their own forecast) and once the Switch2 will be announced I'm pretty sure they will cease production not THAT later, for the OG model (meaning: no PS4-tally for example)
at the same time I'm also pretty sure they won't invest in crazy price cut for the OG model nor invest in a smaller/cheaper version like Sony did with PS1 and 2, or Nitendo did with the 3DS
IMHO of course, but if they will be at 153mil at the end of this FY (based on their forecast) we can safely assume it WILL pass the 160mil mark, but not by that much