Either way my advice still is applicable. You want to get your game out to as many gamers as possible to get as much feedback as possible and should look at every system as a porting possibility. You also gain valuable experience in everything you do while making the games and ports. Nothing you pointed out negates my advice.

While what you say is true, it is impractical. Trying to do all the ports yourself is going to take a considerable amount of time - time in which your game could have been finished and actually be getting exposure, or money to hire someone else to do it for you - money which people making a first game do not have. And in the first instance it is time in which you are not generating income. It is far better to have a game that is 100% complete on a single platform than a game that is 80% complete on multiple platforms.

It is far better to have a game that is 100% complete on a single platform than a game that is 80% complete on multiple platforms.

I concede, my advice was stupid and ill thought out, but to be honest I can't think of any game in recent years that have been (outside of a few indie teams) 100% complete on any platform. It seems to have become a normal thing for AAA companies to ship partially done games and do updates to fix things (GTAV is a recent example of this, a few updates back they broke the firetruck functionality (water hose would no longer fire when driving it) and was an update or two before they fixed it). Anyways, just ignore my previous advice as I don't want anyone wasting money or time because of me.

seems to have become a normal thing for AAA companies to ship partially done games and do updates to fix things

On many platforms (sony and xbox consoles, and even for Apple's 2 weeks) this is due to the delay between shipping the game and it going live. If the developer wants to hit a date, knowingly of the delay caused by the publishing partner, they need to ship 'too early' and prepare for a day-one patch.

For example:

1st party takes 2 weeks

You want to hit July 21

You ship July 7 and expect positive approval by the 21.

From July 7 to July 21, you keep hammering down these bugs and prepare a patch to send over as soon as you get approved.

Patch gets approved must faster and airs live around the 23rd.

(above example considered fast-tracked for smaller consoles such as Apple).

That's the 'dirty' effect of 1st party approval. Of course, initial submission still needs to go through TRC, Lotchecks, etc. So the upside is the game won't crash on boot (hopefully).

That's one of the many reasons why I'm leaning to PC markets nowadays (Steam, Desura, etc.) Even when they're not proprietary, they give the developer much more power over "when to release" and this tend to leave much less dirty day-1 patches (which often come on day 5+).