I am most concerned and sad about the current development of the new Jetson Nano roadmap, as discussed in this thread . I am currently developing a new product using the Jetson Nano and would have loved to use the Nano. It would be the ideal choice. We are planning for a lifetime of 8+ years.
Security updates are a top priority for us, as the Nano would be directly connected to the internet. Maybe some Nvidia officials could clarify the situation, especially about the two following points:
The official documentation  points to the current kernel sources located here , i.e., tegra-l4t-r32.5.1. The last security patch from the official Linux kernel I could identify is the merge “Merge branch ‘android-201’ into rel-32” if I see it correctly. Now, Android-201 is using Linux 4.9.201, which was released on November 16th, 2019. After this merge, I couldn’t find any other security/bugfix patches from the official Linux kernel merged to the L4T kernel. Quickly scanning over the kernel log revealed that over 5000 security/bugfix patches of 18 months are not in the current L4T kernel. In the case I looked at the wrong L4T kernel tree, I would love to get a pointer to the correct tree.
However, I am also worried that there won’t be any backported patches to the 4.9 L4T kernel after the official EOL of mainline Linux kernel 4.9 on Jan’23.
In the last post in  suhash wrote:
“For the future, we are working towards enabling developers and customers to bring different kernel and distributions on Jetson for greater flexibility.”
Does this statement include the current Jetson Nano or only future devices?
Is there any current (experimental) 5.10 based kernel, with hardware acceleration, for current Jetson Nano devices?