In the past, digital "zoom" was not taken seriously, but today's high pixel count sensors allow for a pretty good crop.
For example, the latest Leica Q3 has a crop-to-zoom mode (introduced in the Q2).
The 60MP full frame sensor with the excellent 28/1.7 lens allows cropping to the following equivalent focal lengths and apertures:
28/1.7 (1x): 60.3MP
35/2.1 (1.25x crop): 38.6MP
50/3 (1.79x crop): 18.9MP
75/4.6 (2.68x crop): 8.4MP
90/5.5 (3.21x crop): 5.8MP
20 years ago, 6MP was a very good level for amateur DSLRs (the Canon 300D was introduced just in 2003 for under $1000).
Is the 75/4.6 or 90/5.5 equivalent too slow? At least, it's on par with budget zooms. For example, the Sony FE 28-60/4-5.6 from the Sony a7c kit is even slower.
For comparison, the long focus module on the iPhone 14 Pro [Max] has a 77/24 lens equivalent (yes, that's right, f/24 - very slow) and 12MP.
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