I think Porsche provided official guidance that it's OK to delay your maintenance a month or two until this thing blows over. If you're only putting 4,500 miles on it a year I wouldn't worry about another couple of months' worth of driving.
Do note, though, that many Porsche dealerships are open and may offer home pickup / drop-off service: http://markets.financialcontent.com/stocks/news/read?GUID=39709953
Do note, though, that many Porsche dealerships are open and may offer home pickup / drop-off service: http://markets.financialcontent.com/stocks/news/read?GUID=39709953