Notwithstanding any of this, I always say, don't buy household products that require the internet to perform its core function. Fridges, microwaves, blenders, air conditioners, vacuums, washers and dryers don't need the internet. If they do, they're a shit product.
In some limited cases I can see justifiable internet usage for otherwise "dumb" devices.
From your list, microwaves would be on that list. The reason is simply that nobody knows how to cook with a microwave without specific instructions for nearly every single product. Most instructions printed on packets are void of specific information about the microwave type, design or power handling. Most instructions printed by the microwave manufacturer are vague and do not apply directly to any product/substance you might microwave.
So the ability to scan a bar-code or take a picture of what you are microwaving and having some AI come up with as close to ideal cooking sequence, varying power levels, auto standing time or even utilising a built in halogen grill to brown etc. etc. When new products get added to the data base everyone benefits.
I am all for this. However. The current global adherence to "ethics", "privacy" and "personal security" are far, far, far behind the actual technological abilities. Like NASA found to their detrement and 7 people lost their lives, ignoring the engineering principle of "If it can happen, it eventually will happen", the way data is used by services providing the above will be unethical, privacy invasive and result in a genuine loss of future security for the individual owner.
If money can be made now or later and if the laws are not CONCRETE and well established, they will be exploited and it will be nearly impossible to remove it all later.
The more information you currently "radiate" out there and trust me it is radiating, the more you are training the world to impersonate you, attack you, disregard you, impair you. All just so your microwave pizza is cooked better!.
So, I would be very interested in a microwave with an local API I can use to drive an ethical, free, open source version of the above so that each individual can retain control of their own data.
For the vast majority of individuals their choice is basically complete acceptance or complete abstinence of partaking in the "smart world". I gather about 95% have for for complete acceptance and most just don't even blink before ticking ACCEPT ALL.
The only plus side is, it's going to suck for so, so many people that nobody is going to care about "surviving" unscathed. In fact it is very likely to turn against those who's lives are not publicly open on platforms. The larger society will become afraid of the reclusive and pitchforks and town square stonings will ensue (stretching the analogy). <- inspired by Ben Elton's Blind Faith novel.