The incongruity of sticking a big white twisty inside a fancy ornamental/antique fixture for all the world to see is what bugs me. I expect starkness and harshness from more functional fixtures like security lights, but one could argue that aesthetics are a big part of house fixtures.
I suspect that we're just going to have to disagree on much of this subject.
The vast majority of 'ornamental' outdoor fixtures I see have been pressed into the security/safety role. Sometimes they're actually well-considered and tasteful, but some 90% of the time they're from a model home from the late 80s/early 90s - gaudy and dated years before they rolled off the assembly line. Exposed CFLs surely don't look right much anywhere, but from my perspective there's not a lot of aesthetics to wreck with most of these fixtures.
I've accepted that 5000K might be more than the average person cares for in residential areas
(metal halide streetlights are a curious exception), but I feel that aiming for
sodium vapor <2200K like I see so many doing is committing the opposite sin, bending "warm and inviting" to a dinginess that just doesn't seem to illuminate no matter how many lumens you throw at the problem.
But the market is meeting this demand, so perhaps more decorative outdoor fixtures will be sporting filament LEDs rather than CFLs in the future. I just hope they have some sort of filtering so I don't suffer the 120Hz rectified AC flicker that most LED Christmas lights do. Was in a restaurant last night with at least 100 cadelabra filament LEDs with this very 'feature' - thankfully their supporting fixtures were sufficiently overhead that they didn't even enter my peripheral vision unless I looked up.
To me, they're a natural for the automotive retrofit/replacement market, so I'm surprised they haven't been adopted. Given the poorly-designed and ill-suited efforts to create LED drop-ins for other applications, like headlights and signaling lamps, LED filament festoons for interior lighting are at the opposite end of the scale, and almost perfectly emulate the look and performance of incandescent festoons.
If replicating incandescent look and performance is your thing, then I can see why you like them. I'm not at all enamored with the <2700K CCT that low-wattage automotive lamps put out nor have I found the afterthought reflectors they're often put into of any benefit other than extracting a few more lumens from the backside of the filament's radiation pattern.
I'm not aware of any drop-in LED
headlamps that can meet the exacting technical requirements for the platform - but that surely doesn't stop hucksters from trying. I believe there are now a few drop-in signalling lamps that meet technical requirements but they're both drowning in a sea of subpar trash and the applications are so narrow as to make them a truly marginal proposition.
With the enduring market preference for higher CCT exterior lighting kicked off by HID headlamps on luxury cars some ~25 years ago, it should come as no surprise that this extends to interior lighting, thus >5000K is incredibly common.
Instead, companies like Philips just source some pieces with one or two 5050 emitters from Asia, and call it a day. Osram puts a bit more effort into it, but the output still falls short, and needs to use a diffused tube to evenly distribute the output from whatever emitters it uses.
My experience has been quite the opposite with 4- and 6-package lamps be they 5050, 3020, 2835, or 3014. They
greatly exceed the performance of the original incandescent filament bulbs while providing a cooler color temperature that just seems to
work better in providing utility illumination in a vehicle. The diffusers in my vehicles' fixtures distribute the light to my satisfaction.
However, with filament LEDs being produced almost-exclusively in warm white and now in festoon format, your demand can be met. I'm OK with this, still just a bit surprised that there's enough larger demand in the marketplace to justify their production.