What happened to SanDisk Ultra 8 GB 48 MB/s?

What happened to SanDisk Ultra 8 GB with read speed 48 MB/s? That was the best SD card for using with Raspberry Pi but it disappeared from the market!?

I have 10+ of those SD cards but I can’t find them in the stores anymore. Are they out of production?

8 GB SD card is (in most cases) better than 16 GB card for using with Raspberry Pi because it is faster to make a backup and backups needs only 8 GB instead of 16 GB disk space (compressing image files is quite time consuming so it is not an option).