Don't say that, I don't want to buy Xenotrash. I just want my real DBZ Fighter.

Well, I guess that's up to the publisher to decide!!

"Business" is quite a generic term which doesn't say much, do you mean profit? Tech is important and also effects profitability. Tech effects the costlength of porting and the presumed audience on each platform. 

Beyond that there are plenty of cases of developers ignoring platforms which don't allow them to fulfil their ambitions. This is why so many games skipped Wii.

Yes and better tech means higher costs. People on the high end system expect higher graphical fidelity than that on the switch or 3ds or ect. Thus they need to put more resources into the game. (resources = Money)

But this is purely a marketing scheme.

They have a late port coming to the Switch in Xenoverse 2. Late ports don't do the best usually, because lots of people probably already own the game that would have otherwise purchased it for the new system.

So how do you get people to buy your late port? You extort them by saying you bring the new game to the system if it looks like there is demand. Demand = sales of old port.

I can just see them in their board room going "okay, we announced we are bringing xenoverse to the switch back when system was unveiled. We have a new game coming out that if we announce it to the switch may cannibalize the ports sales. How do we make sure that doesn' thappen?"  One guy stands up and goes. "Don't announce the new game for the switch, but instead say we are waiting to see if demand is there. That way fans will HAVE to buy xenoverse 2 in hopes that we bring the new game over"

GGXrd is on ps3, so I would hope it can run it.

1) Business = bottom line = profit.

2) Yeah, like 3DS got ignored because it was the weakest console of the generation... oh wait... that would be a total lie.

3) Wii got, "skipped" (it really didn't but lets say it did because you are... not educated) because developers were not seeing proper business when they made games for the console. If CoD would have sold 10 million instead of 1, do you really think we would not have seen thirty (instead of the what, 4) CoD titles? Business is all publishers and developers care about. Make them money and they will make you games. 3DS business (as all Nintendo handheld business) was good so developers workd on the platform in spite of it being weaker than Vita, PS4, XBOX One, Wii U, PS3, and XBOX 360.

When people come up with, "Switch is too weak to run this game" all I do is laugh about it. If 3DS can run Wii U titles, Switch can run PS4 titles (concessions made, of course) but the question is, will it be worth the money invested to make a port for Switch? Business is the answer to why certain games are not coming to Switch.

You can haaaaave... a full-priced port!

...Again!

But don't forget that several times Nintedo fans complain that the Nintendo port were gimped compared to the other consoles and thus sell even less.

PS3 and PS4 had to pay full price on several year old port that MS got temporary exclusivity, and it even outsold X1 version at that.

Official Petition
https://www.change.org/p/release-dragon-ball-fighterz-for-nintendo-switch

Yes! Now we are 3100