18 Oct 2018: They removed FSD from the Design Studio
11 Dec 2018: Elon tweeted about the computer swap (screenshot below).
27 Dec 2018: Elon said the computer swap will be free. See the screenshot in my previous message.
12 Feb 2019: In a podcast here Elon said new FSD features require HW3
1 Mar 2019: Tesla blog post here says the difference between buying AP and FSD in the past and buying it now is that it's now cheaper
Based on these details, it is clear that anybody who bought FSD will get the HW3 computer swap for free regardless of when they bought FSD or how much they paid.
11 Dec 2018: Elon tweeted about the computer swap (screenshot below).
27 Dec 2018: Elon said the computer swap will be free. See the screenshot in my previous message.
12 Feb 2019: In a podcast here Elon said new FSD features require HW3
1 Mar 2019: Tesla blog post here says the difference between buying AP and FSD in the past and buying it now is that it's now cheaper
Based on these details, it is clear that anybody who bought FSD will get the HW3 computer swap for free regardless of when they bought FSD or how much they paid.