I tossed all my outdated and old fashioned Christmas tree lights and replaced them with LED's. I like the reflections they cast on the walls and floor.
I think the LEDs are a good idea! They save electricity, will probably never burn out in your lifetime if you used them every christmas, will not start a fire. The first white LEDs produced an intense bluish cool white light, but now they have "warm white" LEDs that produce light closer in color to the light produced by incandescent bulbs. The colored strings of LED lights do seem to include slightly different colors than the colored bulbs in a string of incandescent "mini-lights". To the OP, if you don't like the way they look, don't buy em. No one is forcing you to buy them or use them. We simply have more options in lights now than in the '80s. If you want the old style, i'm sure you can still get 'em. Last time I was in this restaurant that's around the corner, they had strings of the older style bulbs you posted. I think all the lights are nice.
LED's are the future and there's lots of room for improvements. Not all LED's are equal either, there are many different qualities and types. The problem with the cheaper LED's or "cold" looking led's is the way the diode element or "die" works. They emit narrow bandwidths of light or specific frequencies. If you look at full white light through a prism you get an unbroken rainbow of colors, reds blend in to greens, blends in to yellows, in to blues... If you look at a white LED through a prism you may find a thin strip of red, then a big gap, a strip of green, another gap and then a line of blue... the rainbow is broken and many transitional colors are missing. On a better quality LED you might see a bit more colors, more of the rainbow will be filled in. As with any technology the price will decrease and the quality will improve. Richer, fuller, brighter, more complex lighting will come. Yes, it is more expensive to manufacture than a 'wire in a vacuum' that outputs the equivalent of 400-600 LED's but factor in the lifespan and power savings and LED's are quickly becoming the smart option. So get used to it, LED's are not going away. It amazes me any time I see a product that actually still uses a filament bulb for anything. That is beyond cheap at this point, filaments are just tacky, cheap and irresponsible as far a manufacturing goes.
You can buy those big bulbs again. At target this year there were sooooo many kinds of lights! I also saw them at lowes.
This year I met an old couple from Switzerland who said they use candles still on their tree every year.
Ya gotta be very careful with open candles though!! (I suppose ppl know how to do it safely as they used to all do that)