Not comparing to Zephyr, which ticks all the same boxes, is absolutely a problem.
And I would argue that Arduino support nowadays is a negative, not a positive. Arduino support means that you are going to do a bunch of things to support 8 and 16 bit systems that look absolutely silly on 32 bit systems. And, it's not even clear that Arduino systems are actually cheaper or lower power than ARM Cortex-M4 systems anymore--which negates the advantage of Arduinos.
I completely switched to the Adafruit Feather M4 series for my hobby electronics about 5 years ago. Each board might be a little more expensive than a base Arduino, but they are way more powerful and have a lot of great features.
Which boards are you thinking of? "Blue pill" STM32F103C8 boards are $2 to $3, if you're willing to run the risk of getting a cloned microcontroller. (The clones are actually quite usable for most purposes.)
Oh, those! I have one of the F401 models -- I didn't know there was a F411 variant, though, nor that they've gotten so cheap. There might be a purchase in my future. :)
Not sure why you're being downvoted. ISAs like avr, 8051, and msp430 aren't really any crazier than arm. The archs that are a pain aren't because they're 8/16 bit.
And I would argue that Arduino support nowadays is a negative, not a positive. Arduino support means that you are going to do a bunch of things to support 8 and 16 bit systems that look absolutely silly on 32 bit systems. And, it's not even clear that Arduino systems are actually cheaper or lower power than ARM Cortex-M4 systems anymore--which negates the advantage of Arduinos.