T-types have been a contant cause of frustration with me.
Mostly I'd say because Intel's drive to constantly segment the market has then left many of those segments too small to be viable for OEMs and resulted in more and more niche plots going empty over time.
One of the earliest 24x7 PC or µ-server appliances in my home[-lab] was a pfSense firewall/proxy, which would augment the one in the router I just didn't trust enough to keep the garbage out. Especially since kids and wife weren't at all security conscious at the time. I started with an old notebook (single core Merom or Dotah, if I remember correctly) for the low-power, but once the Internet bandwidth Steam-ed up, something bigger was required.
I got my first start on Atoms with a Bay Trail J1900, but that couldn't keep up once packets were inspected more deeply, so I concluded I really needed Core power, but without the consumption or noise of a full desktop PC.
Nearly everbody was absolutely crazy for top clocks, while I wanted top performance for a given power and cooling envelope, ideally within the then notebook range of then 35 Watts tops. But nobody sold notebook chips in a Mini-ITX form factor at the time, only Atoms which were a little too weak.
Only the T-variant of the then top-of-the-line i7-7700 series seemed to fit, which wasn't any cheaper than the i7-7700, only supported lower PL1 and PL2 settings: otherwise it seemed identical. So why wouldn't Intel simply allow lower TDP for normal Core CPUs to cover that?
Anyhow, the ability to on one hand run CPUs at near normal desktop power and performance, yet also be able to curtail their Wattage for 24x7 µ-server use has been a constant pain over the last decade. I constantly rebuild system and like to move parts around so this loss of flexibility has cost me quite a bit over the years (exactly as planned by Intel, I guess).
But of late mobile on desktop designs have become a thing, especially for the Chinese domestic market, I guess, but it's spilling globally via Aliexpress and others. And while notebook chips command a premium when they come out (more expensive than T-types), they fall out of fashion just as quickly and are sold at high bargains a generation or more later. Hence this mobile-on-desktop market from smaller Chinese OEMs.
Case in point: I got myself a Minisforum BD790i the other day, a Zen 4 Ryzen 9 7945HX 16-core on a Mini-ITX board, which comes with a 100 Watts power limit by default (and overclock abilities), but can also be configured to 55, 45 and 35 Watts and runs amazingly cool with just a small fan while providing quite significant compute power.
At €500 for the full 16-core system and 24 lanes of PCIe v5 it's quite an attractive alternative to what you'd have to spend on a Zen 5 8-core these days (and the same price as a 7950X CPU). It might not do games at 400 FPS on an RTX 4090 in TrueHD, but while it wouldn't do badly in any gamer setup, it's main attraction is that it's usable over such a vast range of applications, including a quiet µ-server that still packs quite a bit of punch for short peaks.
Hyperscalers design for the optimal hardware at near constant >90% loads, my stuff tends to be often idle. But when there is things to be done, I want them done fast, just like on a notebook. And these new mobile-on-desktop systems offer just that, albeit at the cost of not having a socket, but often at a price where the mainboard is for free.
And that's where I stop complaining about soldered SoCs.
Now if Dragon Range only came with ECC support...