mjparrett wrote:too much is made of opening strategy. It isn't chess where there are clear right and wrong moves once you start down a certain opening.
This is definitely true, in my experience.
The way I approach openings is that I don't think it's right to say that a certain opening is "good". Everything in this game is conditional, especially when you have 6 opponents all still on the board. To me, any opening that is the most efficient at accomplishing what I want to accomplish is on the table. The only time an opening is "bad" to me is when the objectives you're trying to accomplish could have been done better by a different set of moves.
So, to go back to the OP, I don't think any of the openings being asked about in that post are "bad". I can think of conditions where you might want to do all of those openings:
1. As Austria, what's the possible value in moving Vie-Bud? Well, in the opening you describe, Austria didn't move Tri-Alb; so perhaps Austria is leaving open the possibility of Ser-Gre, Bud-Ser, right? But in fact, I've even seen people play Vie-Bud with Bud-Ser and Tri-Alb. I think, to answer your question, there is something important you're missing: from Budapest, you don't just have the ability to take Rum; you also have the ability to support someone else there. Assuming you're pro-Russia, this could be a big help if Turkey is gunning for him early; or it could also be a key part of the Bulgarian Gambit--Russia plays Sev-Rum in S01 and then A/R have a supported attack on Bul in F01. (Budapest becomes a really useful back-line unit, either to backfill Ser or to support a Russian backfill into Rum, depending on who moves.)
2. If you're Turkey, and you find yourself in a game where you want to attack Russia as aggressively as possible right out of the gate, then this is the most straightforward way to do it, and as such it clearly is "viable". What your question is really about is whether you ever want to make this your goal, not whether this is the best opening to achieve that goal (it is). The answer to that question is "it depends". If you think Italy and Austria will create conditions where you can get away with this, then why shouldn't it be on the table?
3. I also really like the Mar-Bur bounce, but as other posts have pointed out, it's sometimes not worth doing when you're playing with a German player who really wants to move to Ruhr. If you're playing with one who is OK staying home in Munich in S01 (as I am and I believe many other players are), and you think Italy won't go to Piedmont, and you also don't want to put your fleet in Spa/sc, then why not?