Amazon has stopped selling the Fire TV amid rumors it's planning to introduce new devices. The dedicated landing page for the Fire TV says it's "currently unavailable" with no date of when it might be back in stock. You can still buy a refurbished one, however. The Fire TV is also no longer depicted in the carousel on the Fire TV page. So yeah, we're probably getting a new Fire TV very soon.
Many have loved this old Fire TV box as it offered a built-in USB port and ethernet without the need for an adapter. If you want something with more power though you may want to think about getting the Fire TV Stick 4K as it comes with a better 4K HDR and a faster quad-core 1.7 GHz process for a cheaper price. The processor may be slightly slower but the quad-core processor gives you a far better experience than the dual-core.