The bootlooping issue is a severe one as it males your device stuck in a reboot loop that forces your device to enter into recovery mode every time you reboot the device. However, what if you send such a device and it is returned to you with added RAM?

Member of the XDA Developers "Cathair2906" faced an issue with his LG Nexus 5X where the device was stuck in a bootloop. As with most LG phones, the problem of bootloop is related with the CPU. However, in the Nexus 5X, the issue is more severe as the RAM and CPU are mounted on the same component. So when he tried asking the Hong Kong service center for a repair, it was declined to finished warranty. That's when he sent the device to China for unofficial fixing.

The repairman in China suggested that the CPU has been replaced and which is why, the RAM will be changed too. Apparently, it also got upgraded to a 4GB one.

The phone has been running without any issues now. The user also upgraded from Android 6.0.1 to Android 7.1.1 using official OTA and mentions that there is no issue. He mentions that opening the camera and multitasking has been much smoother now. Here is the CPU-Z result:

For those of you who own an LG Nexus 5X and doesn't mind voiding the warranty, this might be a neat trick to increase you RAM.