Why isn't spyro: A new beginning & Dawn of the dragon BC on xbox one yet?

I hate seeing older games being left behind to rott on consoles that break down over time with no way to fix them or consoles that become harder and harder to find, I just want to play my favorite games on modern systems

Actually is the game developer that decides for which platform their creation would be available so I suggest you to post your request at their corresponding forums.

It's up to the developers, but there can also be licensing issues and copyright issues, and other things that means games can take longer to be added to BC or unfortunately never added to BC.

Tha's sad, just think of all the games that will be lost in gaming history with no way to play them years from now.

I'm happy that there is a mod hacking group on the internet that puts games up on the net for free downloads so games won't be lost in time, also thank the mods for awesome emulators.

I hope the xbox team asks Krome tudios if it is ok to make those spyro games bc on xbox one or Activision

Careful with the terms you use on the forums! Any hinting to hacking or online piracy is against the rules.