if Apple only uses the same energy developing new products....
Such as? As 'revolutionary' as the iPhone was, it wasn't the first phone of its kind. Most credit IBM's 'Simon' with being the first smartphone, and it was released 13 years before the iPhone, in 1994. Blackberry also had released an internet phone before the first iPhone. There are probably others.
That's not to knock the iPhone, but it shows that if the iPhone had never been developed, we would probably all still be using a smartphone today anyway. A lot of companies were close to releasing this type of product in 2007, and a few had been working on something recognizable as a smartphone for a decade before then. Would that non Apple influenced smartphone look and act the same? In many ways yes, and in a few ways probably not, but we will never know what those additions and subtractions would be.
Computers? When the Macintosh was released in 1985, it used a Motorola 68000 cpu. The Amiga also used one, and the Amiga also used 2 co-processors, one for video and one for sound, to further increase its speed. The Mac was monochrome, the Amiga could display 65,000 colors. The Mac could only run one task, the Amiga was multi-tasking.
In short, a lot of the 'advancements' weren't developed by Apple, they were improved upon by Apple. The iPod wasn't the first portable music system, it was the first one where you didn't have to worry about whether the digital music file was pirated or infected with viruses. The genius of the iPod, besides the elegantly simple controls, wasn't the songs it could play but the service, iTunes, and what it provided- a safe, legal and relatively cheap place to buy music.
If you want to argue about reliability, then Apple did have a deserved reputation. Their computers were more expensive but lasted longer and with fewer problems during that time. And the OS was more stable than Win98/ME/XP (at least before SP3) Vista or Windows 8.
When I first bought my first iMac in 2008, I joined this site to get news and tips. One of the things that annoyed me (and with some posters, this still annoys me today) was the out and out worship of Apple and especially Steve Jobs. He was, during his second run as the CEO of Apple, smart, decisive and focused. But he wasn't always right.
Now things have flipped 180 degrees. Tim Cook, and by extension Apple, can't do ANYTHING right in a lot of peoples eyes. And they pine for a non-existent past with Steve Jobs at the helm. Unless someone has information otherwise, Tim and company didn't suddenly kill every product and concept under development after Jobs died. We are just now reaching the end of the 'After Jobs' era. The products and software released in the last 8 years were probably all started under Jobs. That's definitely not to say that what the end result turned out to be is the same as what it would have been if Steve Jobs had lived, but I bet the technology and much of the software behind it wouldn't have been very different.
There are things I wish that Apple would quit wasting time on (self driving cars) and things I wish they would spend more time on, but had you asked me what those things should be in 2006 I wouldn't have guessed phones and tablets. And I doubt that anyone who was a teen or adult at that time would have guessed them either.
Who knows, maybe in 10 years Apple will have beaten Tesla in the car market and all of us bad mouthing Tim in that department will have to eat crow. I don't think so, but I've been wrong before.