Since upVerter is supposedly still being supported – I am still trying to get a response from Altium on this - and software designers still want suggestions, perhaps this will be helpful.
I used upVerter in 2021 to make a PCB and it worked great. However, I had to create most of my own parts. UpVerter has resistors in its library. If I was using all one style of resistor (let’s say all were 0.6W and 6.3mm length), I would find one in the library that worked and I liked (its pads were big enough and the right size, for example), I would use it for all my resistors. I would then keep a separate record - outside of upVerter - on the values of the resistors. Same basic approach for the capacitors. Connectors were a problem - I created parts for all my connectors. I had a PCB-mounted transformer, so I created a part for it. We were using a dual triode vacuum tube, so I created a part for it. We had the PCB manufactured, we soldered all the parts and connectors in place (both surface mount and through-hole), we plugged it in, and it worked - no errors, no rework necessary. Beautiful, nice clean job. UpVerter worked great.
But … problem in upVerter - if there is say a 0207 size resistor, upVerter only needs one resistor for this. There is no need to clutter up the libraries with this same size resistor in many of its values (50 ohm, 1.2K, 56K, 1M, etc), and often created by different people so many of the resistor options for the same part have different footprints (lengths, widths, pad sizes, distance of pad from the resistor body, hole size for the through-wires, silkscreen outline, etc.). Same thing for capacitors. The values of the resistors, capacitors, inductors, is not very important as to laying out a PCB. What matters is that the parts will fit once the PCB is manufactured, and that the silkscreen markings on the PCB are the correct dimensions for a part.
Another problem is that people who make parts label them differently. It is not uncommon to find more than one version of a part on upVerter. It also makes it hard to find parts in searches. I may have created an upVerter part for a part already in the library, but I could not find the part - so after an hour or two of looking, I would give up and just create my own.
I don’t use upVerter to document my schematic. I document the schematic and its parts - the values and part numbers - outside of upVerter in a separate document. I use upVerter to create an accurately wired circuit to the right size and dimension parts, and then use the PCB tools to make the PCB - this ultimately is all that matters. My master schematic, then, is the one I have outside of upVerter, and upVerter is subservient to it (not the other way around).
The lament above about having a concierge make the part and this is holding up a project … well, I might suggest you make the part yourself. Then you know what you have. It does not take very long to make a part and have it added to the library and you will then no longer be held up waiting for someone else whom you cannot contact directly.
I might add, and end with this: Parts do not have to be verified in order to make the Gerber file and have the PCB manufactured. One can wait forever for a part he or she created to be verified. I have run across the situation where I had to create a part or I could not make the PCB. In that case I did not have time to have an outside party verify it. So we would check, double-check, and triple-check the part we made to ensure it was good. Then we would trust it and make the PCB. This has worked well for us