It's a complete non sequitor. Launch line-up should affect launch sales, not sales 3+ years later. And PS5 had no trouble at launch - it had the best first-year sales of any PlayStation. If you want a reason to think sales are dropping, look at the fact the price is still $500! If next-gen GTA VI was released late last year and the console price $400, we wouldn't be looking at a sales slump supposedly caused by a lack of launch titles.
I don't think it's a non sequitur at all. Tangential at worst ¯\_(ツ)_/¯
The paltry launch lineups of the PS5 and Series consoles didn't matter too much in isolation, just as their feeble subsequent years wouldn't matter too much in isolation. Combined, they're an issue by the time the prospect of purchase reaches the normie gamer - at launch, they didn't hear of exclusive must-plays; years in, they haven't heard of exclusive must-plays.
It's why I said I think there's "something to it" not that I think it paints the whole picture. I certainly agree that the high price is probably the primary cause.
That quoted statement arguably describes Nintendo's current predicament much more than either Sony's or Microsoft's ...
Everything regarding details like backwards compatibility, pricing, performance, form factor design, software lineup schedule are very much uncertain as they continue to refuse to share any pertinent information to the public and there valid reasons to compromise one of these aspects ...
If Nintendo goes for a straightforward follow up in terms of pricing/form factor then sticking with their current hardware vendor may be sub-optimal depending on their requirements since they show a disdain currently for designing small dies and supporting high-end features like virtual geometry, dynamic global illumination or high quality shadowing techniques for higher budget games becomes out of the question. If they drop portability altogether then keeping their current hardware vendor while doing software BC with high rates of compatibility becomes a far more tenable proposition for them but can they contemplate the fact that they're now on more equal footing with both Sony/Microsoft in terms of competition ? Do they come out with a relatively high price point ($499USD ?) out of the gate while trying to do a little bit of everything else in a global economic downturn ? In all cases they cannot count on dropping hardware prices without taking more losses going forward to drive up demand as we can see with other current generation console vendors ...
There are potentially so many ways that things can go wrong for their successor depending on what moves they are considering ...
Maybe. We just know so little that it's impossible to say.
At present, we can judge Sony and MS for floundering based on their actions. Soon enough, we may be able to judge Nintendo the same way, but we can't judge where we're only capable of speculation.
As things stand, Nintendo is rumoured to have delayed the Switch 2 so that it has a strong lineup - if true, they're a gaming company focused on releasing a gaming device with solid games to play on it. That strikes me as sensible.
As things stand, Sony is scrambling to regain their focus in the wake of Bean Counter General Jim Ryan spunking years of development away on his GaaS obsession and next quarter thinking. Whether they'll return to being sensible is still up in the air.
And as things stand, Microsoft managed a year with solid games for the first time in a long time... followed almost immediately by talk of going multiplatform to just really take the wind out of their fledgling sails. I'm not holding my breath that they're ever going to be sensible.