no, it hasn't been just like this for many months. As reported the "import" feature being discussed in this thread disappeared just within the last several daysThat's true. The screenshots I posted in another thread on here shows that there was an Import link, next to +‑Manual‑Activity in the top right corner of the Activities page, as recently as 14‑February.
There is also an option to click the + in the upper right corner and select import data. This FAQ offers recommendations for manually uploading files.