In Middle Earth, these advanced tchnologies are truely esoteric, closely guarded, or lost in time. And those that possess this teck do use it in their daily lives.

Feanor created many amazing things: the silmarils, the palantir, etc. But that knowledge and skill also brought hubris, which brought Feanor to his ruin. Elvish technology is like art in the way that often times things can only be created once, everything else is a cheap copy. Take the Simairils, Feanor himself said they could only be made once. Maybe the elves discovered that mass producing rings would have a bad result, imagine a couple o' thousand Ringwraiths running around.

Galadrial had that talent in the family (Feanor was her Uncle), and used her magic (although she bristled at the term) on a daily basis to maintain her little enclave, and only for the benefit of her people. Sam remarks that he can feel the power "down deep", a reference to the power of the ring that Galadrial was operating. Although I do think she developed some of those whoping big trees with genetic engineering.

Was the ability for the Eleves to travel as only a glimmer of light a technology, or just a physical attribute like their superior eyesight?

The Dwarves had great technology in the mining and metalurgic arts and kept it a closely guarded secret (except for the Dark Elf). Much technology was lost when Moria fell into darkness, by the attrition of the wars with the Orcs, and from the attacks of the dragons. Even they admit they they cannot match the skill of of their forebearers. But still, this technology was part of their daily lives: the mining, the smithying, the gem cutting, the making of lamps, stone work, etc.

The Numorineans had advanced technology and used it to bring the entire coast of Middle Earth under their control. Again their technology exceeded their wisdom, and they broke the ban of the Valar, and were destroyed. Those that remained were still quite skilled, but their knowledge was only a shadow of their former glory.

Gandalf, of course, had nice displays of technology, but he was also operating a ring like Elrond and Galadrial, and while it was hidden, it could still be felt. Tolkien refers to his "hidden power" but does not reveal the source until the end. Sauraman was way into tech, check out the cool textiles he invented for his own clothing. Then he too gets involved in genetics, with nasty results. But here's an interesting comparison: Gandolf was a wiz with the fireworks, but it was Saurman that turned this into a bomb at Helm's Deep. Certainly Gandalf knew how to do this, but he didn't - it wasn't his way. Except he did torch a lot of wolves in his time.

I think Tolkien was not opposed to technology, just the abuse of technology. The buccolic Shire operates machines, they quarry for building material, they grind grains: but they have chosen a sustainable society with a very small growth rate. Technology goes bad when you start fouling the creeks and cutting down trees for no good reason. .

On the otherside, there was always technological development, namely Sauron's military industrial complex. Mordor was full of their manufacturing plants, lots of them hidden underground. Who knows what weapons of mass destruction he was holding back on. Furthermore, we all know that Sauron (like his teacher Morgorth) was way into genetic engineering, but not always very good at it. The winged creatures of the Nazgul are some of his better work.