Or put in some massively over-dimensioned heatsinks... Or add a shitload of giant power supply caps... The ways to make something look and feel impressive without adding any additional performance are endless.
And some of those, will provide improved performance under specific "edge" cases - eg: driving a 1.6ohm speaker requiring substantial current... and using the oversized caps for dynamic headroom over short periods of time... the sort of thing amps with "linear" power supplies are often good at - short term peaks providing substantial dynamic capability....
Whereas typical class D designs, are much more efficient, and engineered to their rated spec... with a switching power supply, and an amp designed that way, you get exactly that - your 100W amp will give you 100W and nothing more - no headroom beyond.
Often rated continuous power and peak power are the same (or very close to) for ClassD desings.
Traditional AB designs often publicise their "peak music power" - sometimes this is snake oil - where they advertise the amps ability to put out big W's for a very very brief time... in an attempt to get the customer to think that this is the amps continuous rating....
But the decent (and reputable) ones, rate their amps at continuous ratings, and then may provide information on peak/headroom specs.
Moving back slightly towards the original topic... AVR's intended to drive between 7 and 11 speakers are quite common.... and when driving only 2 speakers (as a stereo amp), they have substantial "reserves" of power, as the power supply is sized to feed all the amps, and if you are using only two - there is plenty in reserve!
This then manifests in AVR's rated at 140W, measuring 160W on the lab bench, when driving stereo only...
But run all 11 channels simultaneously, and the rated power (often measured with only 5 or 7 channels powered) - is not achieved.
So if running Stereo only, a previous generation flagship AVR, will often have much more power & current than one might think!