The Swiss television sender SRF currently has a DOK series "Schweizer machen" following a few people going through the citizenship process (although I believe it could be a bit dated).

The idea of the program does appear to highlight how difficult some places make the citizenship process.

I now have the Swiss passport and ID and a letter from my Gemeinde to return my permit

The same here: Swiss passport and ID. The IDs arrived yesterday and the passports today.

A friend of mine (Zürich- City) has never received a letter asking to return his C permit. Who actually send this letter?Gemeinde or Kanton?
Are there other people still having their permit after the process?

Hello everyone, quick question if I may.

For those of you with experience interacting with the ch@sem.admin.ch mailbox, how long does it usually take to get a response?

Thanks a lot!

I received the letter from the Gemeinde. They just sent me today the c-permit card back that I can keep as souvenir.

The permit per si is cancelled when the naturalization process is completed.

I hope to have clarified your question.

Letter today: as of 25th Nov., I am Swiss and, within 3 weeks or so, i.e. around Christmas, can book an appointment for passport and id!!!

I would try entering your details on Friday or so in the schweizerpass.ch website. If it allows you to go further, your details are synced to it. It does not take 3 weeks....

Thanks. Happen to be off-work too on that day

Congratulations! Any chance you could post your updated timeline?

The Zurich Kanton has increased again the number of case offices handling normal applications from 7 to 8 persons, guessing they have an increased workload with COVID.

https://www.zh.ch/de/direktion-der-j...ml#-1864346150

Jan 2019: Update civil list
Mar 2019: After confusion, submit forms
Apr 2019: Resubmit non-photocopy work certificate
Dec 2019: Interview invite for Feb
Feb 2020: Interview
Feb 2020: Citizenship subject to Kantonal and National approval
Jun 2020: Kantonal approval
Jul 2020: Bill from Bern
Today: Citizenship letter

I tried to ask the British Embassy who to notify, and they gave me a useless UK Visa enquiry number. Anyone have better ideas?

Why Do you think you would need to inform them?
https://www.gov.uk/dual-citizenship

From UK point of view you are British and and for what maters the British citizenship alone is relevant. Having also the Swiss citizenship gives neither any advantages nor any disadvantages (Might be an issue if you work for the secret services or want to become PM). Your Swiss citizenship is only relevant in case you want to renounce the British citizenship.
https://www.gov.uk/renounce-british-nationality

they will be informed by me when I don't renew my passport next time around as I don't see the need

“Sie sind selbst dafür verantwortlich die Behörden Ihres Heimatstaates über die aufnahme ins Schweizer Bürgerrecht zu informieren”

I.e.”You are responsible for informing the authorities of your home country about your admission to Swiss citizenship”

That just means that Switzerland doesn't do it for you.

There's an implied "if you need to" on the end of that.

Exactly. Some countries (like the Netherlands) have restrictions on additional nationalities, so here the Swiss are simply placing the notification responsibility back on you.

I wish I could do the same, but I have to enter and leave my home country (Australia) on an Aussie passport. This will be expensive, as the AUS and CH passports are respectively the world's 1st and 3rd most expensive.

Appointment tomorrow lunchtime

Not renewing your passport doesn't mean you've acquired another nationality. Mabye you just don't want to travel and instead prefer to live in a goat hut in the Alps.

Personally, I wouldn't ever let a passport lapse. You never know when you might need it to see family or escape whatever place you're in, etc. Trying to get a new passport after it expires is always more of a hassle than if you just renew when it comes time.