I wouldn't be so sure. The generosity of the subscription plans has declined GREATLY over the past 6 months or so. They are likely trending towards api pricing parity. In which case, having your own hardware makes sense if you can utilize it well.
I max out my Claude Max plan every week, and I can measure the output, and for me it's stayed fairly constant, subject to the various "bonuses" whenever Anthropic is feeling the competitive pressure.