That message is from April, it appears around mid May that the messaging changed tone.
Link to Boss/Roland web page (in Japanese but use Google Translate for English)
For ease, this is what it says:
May 24, 2024
Dear Valued Customer,
BOSS KATANA:GO End of Sale Announcement
Thank you very much for your continued patronage of our products.
We have suspended orders for the BOSS KATANA:GO due to the procurement situation of the materials used, but we are still unable to predict when the supplies of the materials will arrive.
Therefore, we regret to inform you that we will be discontinuing sales of the “BOSS KATANA:GO.”
–
I did find this note but it was on a YouTube vid so not sure how much validity it has.
“From Roland: We are continuing to experience difficulty in
sourcing parts for the KTN GO.
As a result, we have taken the decision to make some fundamental changes to the design. As this process will take a minimum of six months, and because we are unable to confirm what the changes will be, we have also taken the decision to stop all promotion of the current model.”
But a similar announcement was made on a facebook group:
So whatever the case, it appears the current incarnation won’t be available again and it’s replacement won’t be released for some time.