Yes. It is almost finished.I should make a game on it
I hope so! Too good to be forgotten. 
A few moths ago I was programming Moonsound OPL4, and I have to say that the longer sample Moonsound can reproduce is 64 KBytes. When Paula ends the sample reproduction interrupts CPU giving the opportunity of reprogramming Paula registers to reproduce another piece of sample. Moonsound only interrupts MSX CPU when OPL timers expire. If you want to reproduce a sample with more than 64KB in a Moonsound, you have to calculate the duration of the 64KBytes sample piece taking account the played frecuency. Although Moonsound have two timers with different resolutions (80 microseconds, and 323.1 microseconds). You have to do some calculations and it can be hard to reproduce a long sample without cuts. Paula does this kind of things easier.
And MoonSound does 24-channel PCM + 18-channel FM easier 
. Pros and cons.
One very important thing about Amiga blitter that it is not mentioned by the author is the Amiga blitter only supports copies of rectangular sections with vertical flip (with negative modulus), but Amiga blitter doesn't support horizontal flip :-D. Graeme Cowie or McGeezer, the author of Amiga version of Rygar stores all the poses of all characters looking in both directions because he doesn't have other better option. However, MSX2 blitter can do flip X and flip Y, reducing memory consumption
The V9938 command engine can’t flip. Rather, the DIX / DIY flags negate both the source and destination increment, so the image orientation stays as it is. The flags exist to support overlapping copies without repetition (copy (0, 0)-(255,210) to (0,1)).
On the original question;
Following the what if tendence i post also my question.
Let's imagine that msx2 have used from the beginning a V9958 instead of V9938.
Do you think that this could have been changed the destiny of MSX in a sensible way ?
I mean for example the availability of games or interest in msx before users moved to other system?
I think we would’ve seen more smooth horizontally scrolling games. However I don’t think it would’ve saved MSX (just like any of the other 80s computers).
wow, the background of this weeks pages of naysaying is again some coding problem.
Some interesting coding discussions, figuring out new cool things the MSX / VDP could do, would be nicer to read.
