Encoding 8bit to 10bit MKV and then back to 8bit MKV

[enim]

In past I have ripped personally owned blurays and encoded into 10bit mkv, as 10bits sounded better to me. Over by the time I lost original blurays by lending them to friends. As my hardware players do not support any 10bit mkvs, I have to re-encode back into 8 bit mkvs.
Did I really gain technically something here?

[_Al_]

no, you get worse overall result as oppose to encoding to 8bit right away first time

depends on bitrate, how much this is valid, theoretically if you compress to lossless 10bit and then to 8bit you are on the same wagon but more compressed it was first time, the worse it will look comparing to that hypothetical: BD -> 8bit encoding

[jagabo]

Every time you encode with a lossy codec you lose quality.